Agriculture Revolution: Agricultural Robots Boost the Emergence of "Unmanned Farms" Globally

In recent years, rapid population growth, increased pressure on food supplies and declining agricultural labor force push the demand for agricultural robots. Whether building "smart agriculture" or developing "unmanned farm", agricultural robots are well-deserved protagonists.

Several centuries ago, the industrial revolution and technological innovations have greatly enhanced our use of the earth's resources. However, as the population continues to expand, in order to meet the sharply increased demand for food, the future food output will double the current output of food at least. Simultaneously, unfavorable factors such as global warming and urbanization are restricting the growth of crops and grain, output growth is rather difficult. Then how to solve the agricultural problem become top urgent!

In this situation, it is even more important to promote the development of agricultural modernization to the deeper level. Nowadays, the development of cutting-edge technologies such as artificial intelligence, big data and internet of things is changing the era. With the agricultural production mode moving forward from mechanization to digitization, the precision agricultural technology has quietly changed the traditional mode of agricultural production. The high-end intellectualization stage has come. This is the blueprint of future agricultural development.

Currently, agricultural robots have been able to complete sowing, planting, tillage, picking, harvesting, weeding, sorting and packaging work, mainly used in unmanned tractors, unmanned aerial vehicles, material management, seeding and forest management, soil management, grazing industry management and animal management.

Many countries see the broad prospects in agricultural revolution and speed up agricultural robot research and development. For instance, the team led by Professor Stephen of the University of Illinois has developed a new robot. The agricultural robot uses a combination of GPS and laptop to guide the crawler wheels moving between the plants. The robot is equipped with a hyper spectral, HD thermal imaging camera, weather monitor and pulsed laser scanner sensor. These devices allow it to collect phenotypic data such as plant stem diameter, height and leaf area, and crop environmental conditions such as temperature and soil moisture content. They can then use this information to build a 3D computer model for each plant to predict its growth and development, and to estimate the yield of the individual plant and the entire crop.

With the promotion of agricultural robot applications, the concept of "unmanned farm" is gradually emerging. The British "Daily Mail" reported that a group of British agricultural engineers are trying to create the world's first unmanned farm, without anyone entering the farmland to complete the entire process of digging, sowing, irrigation until the harvest, and use unmanned aerial vehicles to monitor crop growth.

High precision components such as precision resistors are applied into agricultural robots, agricultural revolution provides more opportunities for electronics industry. Microhm electronics seizes the chance to research and develop a series of electronics power resistors for artificial intelligence.

Resource: gkzhan.com

AlphaGo Upgraded Again, Artificial Intelligence Will Be the Trend of Future

I knew robots when I watched movies and magazines years ago. Robots are very powerful in movies and threat human being. Years passed and now artificial intelligence is stepping into new century and more and more companies and studios are researching and developing artificial intelligence.

This year, a go contest between AlphaGo and Ke Jie was held and AlphaGo win the competition. What is AlphaGo and why is so smart to beat the champion of go? Actually AlphaGo is a AI program, developed by Demis Hassabis, leader of DeepMind, subsidiary company of Google. The main working principle is "deep learning."

In March 2016, AlphaGo and Go champion, professional nine-player Li Shishi conducted a go man-machine war and won a total score of 4 to 1. In May 2017, at the Go Summit in Wuzhen, China, it competed against Ke Jie, the world's No. 1 Go champion, to a 3-0 overall victory. The go community acknowledged that AlphaGo's chess capability has surpassed the level of top-notch go players in the world. In GoRatings's ranking of world professional go rankers, its rank has surpassed No.1 human player Ke Jie. On October 18th, 2017, DeepMind announced the most powerful version of AlphaGo, code-named AlphaGo Zero.

Go Competition between Ke Jie and AlphaGo 

Artificial intelligence is so powerful and the hot topic occurred all the time: will AI takes human jobs in the future?

AI robots are working in the dumpling factory in Qinhuangdao, China. In the workshop, no workers. From mix the wheat flour, put the stuffing, pinch dumplings, frozen to minus 50 degrees conditions, the robots on the assembly line are perfectly handled.

Self-service supermarket, driverless cars, self-service hotels, self-service canteens...are blooming. AI is not only into these industries, they go into news edition, go, financial industry. Dr. Lee Kaifu predicted that 50% of jobs will be partly taken or fully taken by robots after 10-15 years.

In the past 200 years, it is the time of knowledge and technology. The coming 100 years are the time of intelligence, experience and service. At present, AI is being researched and developed as the core technology in the many countries, China, America, Japan, Singapore begin to speed up the research and development of AI. What do we do in this situation? Do not dwell in the past, do not dream of the future. Concentrate the mind on the present moment.

Microhm Electronics Ltd. Will Participate in 10th International Automotive Electronics Technology Expo

Microhm, as a leading supplier in customized resistors, will take the newest products and high-performance electronics to the exhibition.

Here are the exhibition information:
Booth No.: E45-16
Date: Jan.17, 2018 - Jan.19, 2018
Venue: Tokyo Big Sight, Tokyo, Japan 

Automotive electronics, connected car, autonomous driving, EV/HEV/FCV, lightweight and processing technology are six sectors of the 10th Automotive World 2018. As the exhibition has grown rapidly every year, now it welcomes a large number of exhibitors and visitors from all over the world and is known as annual meeting place for all those involved in automotive industries. Famous suppliers and manufacturers will attend this distinguished gathering. Different new products and technology will be showed to attract customers at home and abroad, also promote the companies' brands.

Microhm( www.microhm.com / sales@microhm.com / 400-803-9333 ) will take our latest innovative products(resistors, shunts) and technologies to the expo. Welcome to visit the booth! Let us share the products and ideas in the new era.

High Power Shunt Resistors Are in Great Demand

Low-resistance shunt resistors are widely used for current sensing in high-power applications in automobile and industrial equipment. In the automotive field, with the deepening of the electronic and electrification processes, the number of small motors and ECUs is steadily increasing, and the demand for high-power and small shunt resistors is on the rise. In this context, in order to meet the needs of users, high power shunts are researched and developed , launched in the market and received high praise from customers.

Resistors are manufactured by using high performance alloy materials, superior TCR is realized during low resistance value range. The shunt resistors are of high precision and reliability. Featuring slim and light, Microhm shunts are performing very well in automation and industrial equipment fields. It can help reduce the design pressure and emerge applications small scale.

Microhm's resistors are not only used for automotive and industrial equipments. They are also seen in household and agricultural fields. Lots of smart electronics like robots also need resistors to make. Quality materials and unique design, the temperature rise is less than other fellow products. Low-resistance shunt resistors are at risk of thermal damage when used under high-power conditions. Excellent heat dissipation can not only ensure the stability of normal use, over-current load resistance will not change, the performance of products is more stable.

In addition, Microhm shunts can be made according to customers requirements to meet different markets demands. The resistors are manufactured by using the technique of high-energy electron beam welding. With the large-area Cu terminals and high-density MnCuNi alloys, the resistance values of less than 100μΩ, high current density, and high pulse power are realized by using the metal strips. The MnCuNi alloys can be punched into various shapes, offering the flexibility in design of resistors with the desired structures.

Stability and Precision, Which is More Important in Choosing Resistors?

Precision resistors means resistance value tolerance, TCR, distributed parameters(distributed capacitors and distributed inductors) such indexes reach a certain standard.

What kind of resistors are precision resistors?

Precision resistors are related to high precision resistors. Precision stands for correctness of resistance value, actually the correctness is effected by many elements, such as change of environment temperature, heat of resistors when current is switched on, pressure or pull force from PCB, moisture of environment, corrosive gas, soldering, pulse, overload, static, radiation, etc. All the elements will make resistance value changing, that is to say, it will impact precision of resistance value. Then what kind of resistors are precision resistors? The answer is resistors with stability and precision.

Why stability is more important than precision?

Resistance value is impacted by different elements, high precision without stability is meaningless. Take an example, the accuracy when resistors out of factory is ±0.01%, we pay for this accuracy, after in stock for a few months or load for hundreds of load, the resistance value will exceed ±300ppm even more. Another situation is that IQC check the accuracy is correct, but when soldered into PCB, the precision exceeds the range of precision. In addition, moisture and static will effect resistance value. Stability is more important than precision in reality.

Choose a professional and reliable resistor supplier is the key point

There are many resistor suppliers in the industry. Resistor categories are various. Brand, history, research and development team, manufacturing, delivery are all the factors a sourcing manager should consider. Microhm electronics is a leader in resistor industry, and they have advanced technology and rich experience in this industry. Resistors are widely used in a lot of fields, such as artificial intelligence, telecommunications, electric cars, consumer electronics, etc. 

How to Choose Your First Noise Canceling Headphones?

Headphones play an important role in our life especially for music enthusiasts. They love music anytime anywhere. But it is not polite if you listen to music in public, headphones are necessary at this time. Noise canceling headphones are a good choice.

What are noise canceling headphones? Noise canceling headphones is headphones using methods to reduce noise. At present, noise canceling headphones contain active noise canceling and passive noise canceling. Active noise control (ANC), also known as noise cancellation, or active noise reduction (ANR), is a method for reducing unwanted sound by the addition of a second sound specifically designed to cancel the first. Passive noise-canceling headphones mainly surround the ears to form a closed space, or use silicone earplugs and other sound-insulating materials to block the external noise.

Pros and Cons of active noise canceling headphones and passive noise canceling headphones

Item	Pros	Cons
Active noise canceling headphones	Effect is obvious	Sound quality inferior
Passive noise canceling headphones	Restore the essence of sound mostly	Not effective in noise cancellation

Now here are 4 active noise canceling headphones fyi.

1. BOSE QC35 II

Recommended reason: Upgraded version, comfortable fit

Used for: Users need noise cancellation

Price: USD349

Comment: BOSE QC35 II takes use of active noise canceling and passive noise canceling technology, detecting various sounds in real time, calculating and reacting, offsetting noise through relative signals to realize closely real quietness. Three noise cancellation modes were applied in these headphones, you can reduce unwanted noise, receiving surrounding sounds, even you wear and walk outside, quite safe. Bluetooth and NFC pairing with voice prompts for hassle-free wireless connections. Up to 20 hours of wireless play time from a rechargeable lithium-ion battery; up to 40 hours of listening in wired mode.

2. JVC HA-S88BN

Recommended reason: Soft touch, comfortable fit

Used for: Users walk outside

Price: USD149.5

Comment: Headphone cavity shell with glossy design, beautiful but easy to leave fingerprint and oil, need rub all the time. Headphones earmuffs are soft and flexible. Bluetooth and NFC pairing with voice prompts for hassle-free wireless connections. Battery duration: Wireless: about 27 hours (noise canceling function off),  About 16 hours (when noise canceling function is on); Wired: about 35 hours (when the noise canceling function is on); Charging time: about 3.5 hours.

3. Teufel Mute BT

Recommended reason: Rigorous, solid workmanship

Used for: Noisy surroundings

Price: USD296

Comment: Teufel Bluetooth noise reduction headphones eliminate a large number of low-frequency noise, and do not impact on the exchange of vocals a lot, also to ensure the safety of walking while ensure communication. Mute BT headset is Bluetooth 4.1 version, supporting apt-X audio high-resolution. Earphones adopt active noise reduction technology to provide the powerful active noise reduction effect of -36dB. The earphones are powered by German-imported "Varta" lithium battery, charging for 2 hours and achieving an amazing 60 hours of battery life. In addition, the headset also uses a changeable line design (3.5mm interface), easy to upgrade enthusiasts or DIY.

4. Sony MDR-1000X

Recommended reason: Outstanding design

Used for: Noisy surroundings

Price: USD298

Comment: Sony MDR-1000X headphones add new Quick attention function, combining two functions of ambient sound mode and reducing the volume of music, by pressing the right side of the headset cavity with your hand, you can quickly and clearly hear the surrounding ambient sound. You can communicate with others without taking off headphones. Quick charge function with 70 minutes playing time by charging 10 minutes.

All the superior noise canceling headphones adopts good components like resistors (Microhm) and materials like earmuffs, just in order to give customers a different music experience, we can escape from noise when we want.

Introduction of Chip Fixed Resistor

Chip fixed resistor is also called SMD resistor, it is one of metallic glass uranium resistors, which mixes metal powder with glass uranium powder and use silk screen print method on basic board to make resistors. These resistors are moisture resistant and fire retardant with small TCR. It can save cost of circuit and make design refined.

Chip fixed resistors are classified as below in general:
General purpose thick film SMD resistors
General purpose thin film SMD resistors
Low resistance SMD resistors
SMD current sensing resistors
SMD networking resistors
High precision high stability SMD resistors
Features of high precision high stability SMD resistors:
High precision: ±0.01% ~ ±1%
TaN and NiCr Vacuum sputtering
TCR: ±5PPM/°C ~ ±50PPM/°C
Wide R-Value range
Products with Pb-free Terminations Meet RoHS Requirments
Application: Medical instruments, high precision testers, electrommunication, automatic equipment controller, communication device, cell phone, GPS, PDA, etc.

Features of SMD resistors:
slim and light;
Applied to reflow oven and wave soldering;
Stable and reliable;
Low cost in assembly, match with SMT;
physical strength and superior performance in high frequency.

SMD resistors are usually widely used in high-end computers, industrial equipment, large scale resistance, automatic controlling machines, electrommunication, multi-media electric instruments, etc.

SMD components are classified according to their shapes: rectangle, cylinder, and polygon, classified according to categories: resistors, capacitors, inductors, transistors, small integrated circuits.

SMT is widely applied now, 90% of electronics use SMT. With developing of small SMT producing equipments, SMT application will be expanded, aviation, aerospace, instruments and meters such fields use SMT electric products.

First Low Cost Robotics Contest: Time-saving Robotic Solutions Win Judges' Favor

MLC-Engineering won the championship

With low-cost robots, it's no longer a dream to complete simple tasks by cost-effectively automation. The first low-cost robotics creative competition entries fully demonstrated the extraordinary potential of this technology. In 2017 Motek Exhibition, IGUS announced the champion is MLC-Engineering. This company, located in south of Germany, combines a modular robolink articulated arm with optical measurement technology to saves up to 76% of mission time.

Twelve entries in the contest

In the first low-cost robot contest, 12 entries showed a variety of innovative ideas, from 3D printing automatic production unit to mobile grab robots, really eye-opener. What they all have in common is the use of low-cost robots to realize the automation of simple tasks, in order to save time and money. The most impressive entry is from the champion MLC-Engineering, they perfectly combined robolink articulated arm with optical measurement technology. This high cost-effective 5-axis robot only 3579 euros, it can grab the processed components from production equipment and send to optical measuring equipment, and adjust the work pieces' positions in time on optical measuring equipment to check all related sizes. Robots input the tested data into the control systems, then the control systems reviewed "Superior / Inferior" according to it. Finally, Robolink robots deliver the work pieces to conveyor belt or thrown into the waste box according to the reports. Simple tasks' automation has a remarkable effect: it can make employees devote themselves into more complicate tasks, shorten the cycle and save up to 76% of mission time.

The award ceremony of Motek Exhibition

The originality of MLC-Engineering conquered the judging panel made up with research and development, professional media and intelligent manufacturing. Their spirit of boldly innovation, excellence and pursuit of the extreme win the praise. Michael Lamber from MLC-Engineering won the first prize: a coupon of Robolink articulated arm or similar robot components valuing 3000 euros. The second prize is a award valuing 500 euros.

Applications in different fields

Robotics is developing and will make great achievement in the future in different fields. Here are some items listed below:

1. Robots in workshop production

Some automatic equipments are brought in workshop especially for factories with 24 hours work times such as injection companies, such companies only need one labor forces to maintain the robots, it save the time and cost.

2. Sweeping robots in household

In household field, sweeping robots are very popular with housewives, they can liberate themselves from heavy housework, especially for housewives who need take care of babies and kids.

3. Robots in hospitals

Robots are also brought in the hospitals, they can take some work from doctors, they can deliver the operation tools and calculate the cost and analyze the medical consumable materials.

4. Robots for education

Some robots are really smart, they can accompany children and play games together. Their chip contains a lot of culture and knowledge, singing, poetry... They are an almighty friend.

Robots applications will be expanded soon, human will be released from heavy and dangerous work, let's look forward to it. 

How to Become a Mobile Phone Photographing Talent

Mobile phones are becoming a life necessity in modern times. There are seldom people with a mobile phone. Smart phones pushed this trend and make each one become a mobile photographer. People love to take pictures, edit, and share with mobile phones, it is really an important part of social networking. It is easy to take pictures with phones, but if you want better pictures, you should master some photographing skills:
1. Stay steady
Mobile phones are light and slim, you have no chance to get large camera handle. Not all mobile phones have Optical Image Stabilization function, so stay steady is very important to get clear pictures.
2. Think before photographing
Lots of people like to photograph at random, the result is usually you got no satisfactory pictures. Even taking pictures becomes a simple and easy thing, but think and compose pictures before photographing is necessary to get nice images.
3. Choose appropriate photographing modes
If your mobile phones have various photographing modes, or install applications with scene modes, choose the most suitable scene to photograph, auto mode sounds excellent, but as a photograph enthusiast, you had better use scene mode according to your expectation.
4. Photoshop
If you want better pictures, Photoshop is an inevitable tool even mobile phone pictures. Nowadays, a lot of related image process softwares invented, we can make wonderful pictures with these softwares.

For most of people, if you master these four skills and practice a lot, you will be a master in mobile phone photographing. However, some smart phone brands promoted their camera phone for youth, for instance, Huawei, OPPO, VIVO, etc. These mobile phones are good looking, and prices are reasonable, they have good photographing effects, they blew the camera phone tornado among youth. In order to improve the user experience, mobile phones as an everyday item, a series of nice materials are used in phones, resistors, screens, capacitors are applied. Professional, Youth, Fashion are slogans for camera phones. This also help you a Mobile Phone Photographing Talent.

Bone Conduction Bluetooth Headphones, Different Music Experience Journey for Music Lovers

Sound transmits through 3 kinds of mediums: air, solid, liquid. Different mediums different sound transmitting. In terms of these features, bone conduction technology is brought in to Headphones and accepted by more and more people.

First let us learn what is bone conduction. Bone conduction is one reason why a person's voice sounds different to them when it is recorded and played back. Because the skull conducts lower frequencies better than air, people perceive their own voices to be lower and fuller than others do, and a recording of one's own voice frequently sounds higher than one expects it to sound. And sound transmitted through solid, the sound quality is much better when listening to music. You can enjoy brilliant and HD fidelity stereo sound: rich bass and strong treble. If you are a music enthusiast, bone conduction headset is worth a try.

Bone conduction headphones is designed according to this theory, they are ergonomically positioned on the temple and cheek and the electromechanical transducer, which converts electric signals into mechanical vibrations, sends sound to the internal ear through the cranial bones. Likewise, a microphone can be used to record spoken sounds via bone conduction. Because of this point, some hearing aids employ bone conduction, achieving an effect equivalent to hearing directly by means of the ears. That's really help people with hearing loss listen to sound again instead of a deaf world. From this function, component should be picked from quality manufactures, either plastic, PCB, resistor, battery, chips and others to ensure the product quality and after-sale service.

As ordinary people, we can still use bone conduction Bluetooth headphones as they can release your ears, unlike other headphones, you need place them into your ears, which make your ears sour after listening to music for some time. As your ears are open, you can hear outside sounds while listening to music, even chat with other people without taking off headset. That add another good characteristic for people loving sports or outside activities as you can stay alert to the surroundings, which protect you so much. 

Next let us review several bone conduction headphones popular in Amazon.

1. AfterShokz bone conduction Bluetooth headphones

Famous brand in bone conduction headphones

Rating: 4.2 stars (5 stars in total)

Price: 129.95USD

Material: Flexible Titanium frame

Battery: 6 hours of continuous play

Bluetooth version: V4.1

Wireless range: 33ft(10m)

Weight: 1.27oz(36g)

Warranty: 2 years

2. JUHALL bone conduction Bluetooth headphones

New brand in bone conduction headphones

Rating: 4.1 stars (5 stars in total)

Price: 62.99USD

Material: Plastic frame

Battery: 6 hours of continuous play

Bluetooth version: V4.2

Wireless range: 33ft(10m)

Weight: 1.38oz(39g)

Warranty: 90 days money back

3. longee bone conduction Bluetooth headphones

New brand in bone conduction headphones

Rating: 3.8 stars (5 stars in total)

Price: 74.99USD

Material: Plastic frame with Titanium built-in alloy

Battery: 4 hours of continuous play

Bluetooth version: V4.1

Wireless range: 33ft(10m)

Weight: 1.55oz(44g)

Warranty: 30 days money back and 1 year warranty

From the parameters according to sellers' commercial, every bone conduction headset seems similar and each has its own advantages, for myself, I will consider the price, ratings and looking if parameters are similar. Anyway, each one has its own choice, just choose your favorite. 

China Launched the First Embedded Artificial Intelligence Vision Chip

Dec. 20th, Horizon released China's first embedded artificial intelligence vision chip. It has two series: Journey and Sunrise, both will focus on smart driving, smart city, smart business application scenes landing.

According to the founder and CEO of Horizon, Yu Kai, Journey 1.0 faces smart driving, it can simultaneously monitor and recognize pedestrian, motor vehicle, non-motor vehicle, lane line, traffic sign, traffic lights and other targets accurately and in real time, and can meet the harsh environment requirements of vehicles and the visual perception needs under different environments. Sunrise 1.0 hidden in smart camera, can large-scale and capture and face recognition locally, , video structured processing, and can be widely used in commercial, security and many other practical scenes.

As per Horizon's chief architect Zhou Feng, the key advantage of Journey and Sunrise is due to the Horizon's innovative technique architecture and combinatorial algorithm, the computing speed of the chip can be increased more than 10 times. Different from general-purpose chip business model, Horizon's chip is focused on specific applications in different scenes, which will promote the acceleration of artificial intelligence applications landing.

There are two AI start-up companies in China, one is the Cambrian, and the other is Horizon that started two years ago. Ding Wenwu, president of National IC Industry Investment Fund Co., Ltd., hopes for Horizon will become "the future of Intel in the field of artificial intelligence."

"By 2020, Horizons' artificial intelligence chips will enable billions of Internet of Things (IoT) intelligent sensing terminals. By 2025, all 30 million autonomous vehicles in the Chinese cars' brains are based on the Horizon's artificial intelligence processors."

If the "small target" that Horizon sets for itself can be realized, the expectation from the industry will come true. And high precision resistors also can make "small target" come true. Anyway, higher quality and requirement for resistors will in the great demand in the market. Wish AI a bright future!

Introduction of Power Resistors

The inhibition conductor to current is called the conductor's resistance. In physics, resistors are used to indicate the size of the conductor impedes the current flow. The larger the conductor's resistance, the larger the conductor impedes current flow. Different conductors, different resistances, resistance is a character of conductor itself.

Power refers to the work done by the object in unit time, that is, the power is a physical quantity that describes how fast and slow work is done.

The formula is: P=W/T

Power measurement

Power measurement is used to measure the power consumed by electrical equipment, widely used in household appliances, lighting equipment, industrial machinery and other research and development or production lines and other fields.

Here are several power measuring methods:

1. Power measurement technology

2. Diode detection power method

3. Equivalent thermal power detection method

4. TRMS / DC conversion test power method

5. Logarithmic amplification detection power method

Introduction of normal household appliances' powers

Air conditioner: 1500W

Microwave oven: 1000W

Electric stove: >1000W

Water heater: >1000W

Vacuum cleaner: 800W

Hair dryer: 500W

Electric iron: 500W

Washing machine: <500W

TV: 200W

Computer: 200W

Range hood: 140W

fridge: 100W

Electric fan: 100W

Flashlight: 0.5W

Calculator: 0.5mW

Digital watch: 0.01mW

Resistors are the most widely used component in circuits, the main physical feature is change the electrical energy to thermal energy, so they can be called energy-consuming component, internal energy made when current passes through resistors. Resistors are usually for dividing voltage and current, for signals, AC and DC signals can be passed through resistors.

Classification of resistors:

As per resistance value: fixed resistors, adjustable resistors, sensitive resistors;

As per material: carbon film resistors, metal film resistors, wire wound resistors, JEPSUN resistors, thin film resistors;

As per installation: SMD resistors, DIP resistors;

As per function: load resistors, sampling resistors(current sensing resistors), shunt resistors, protective resistors.

Main parameters of resistors:

1. Rated resistance

2. Tolerance

3. Rated power

Although resistors are a small electric component, but it contains a lot of information and widely used in our electric products. Microhm electronics is a professional resistors supplier and manufacturer in this industry. They have real-time delivery and innovative products and golden service with good reputation in the world. 

Knowledge of High Precision Resistor

High precision resistors, different from normal resistors, require resistance vale tolerance, TCR, distribution parameters of resistors(distributed capacitors and distributed inductors) to reach a certain standard.

Standard of high precision resistors
For resistors of resistance value above 1Ω, resistance value tolerance within ±0.5% can be called jepsun, higher precision can be ±0.01%, usually for thin foil resistors. Resistance value above 1Ω with precision of ±5%, electronics generally use ±5%, which are not precision resistors.
For resistors of resistance value below 1Ω, resistance value tolerance within ±1%, they belong to precision resistors, because base is small, 1% tolerance is quite small. Higher precision will be ±0.5%, but require higher technology.

Classification of high precision resistors
In electronics, resistors are classified as DIP resistors and SMD resistors. High precision resistors have same classification. For example, SMD jepsun precision resistors, also thin foil resistors, compared with DIP resistors, featuring high precision, lower temperature drift(lower TCR), small volume, suitable for automatic SMT. DIP resistors are classified according to materials, having metal foil precision resistors, wire wound precision resistors, and metal thin foil precision resistors.
Metal foil precision resistors have higher precision, but resistance value TCR and distribution parameters are lower; wire wound precision resistors resistance value precision and TCR is quite high, but distribution parameters are a little lower; metal thin foil precision resistors' precision, TCR and distribution parameters are very high, the precision can reach 10-6, TCR ±0.3×10-6/℃, distributed capacitors can be lower than 0.5pF, distributed inductors can be lower than 0.1μH.
In DC or low frequency AC circuit, wire wound precision resistors and metal foil precision resistors are chosen instead of expensive metal thin foil precision resistors. Metal foil precision resistors are cylindrical, wire wound precision resistors are cylindrical, compressed terete, rectangular frame shaped. Metal thin foil precision resistors are square or platy.

Replacement of high precision resistors
When rectangular frame wire wound precision resistors are broken, new alloy resistor wire same as old resistor's alloy, diameter and length wound in the original frame. If original rectangular frame precision resistors is damaged on surface, the original resistor wire removed and dipping lacquer again, dry and wound to rectangular frame.

Current Sensing Resistor for Power Supply

Current sensing resistors are also called sampling resistors. Simply speaking, it is an SMD sampling resistor with small resistors, it is usually series connected to circuit to exchange the current to voltage signals for test.

This kind of resistors are categorized by function. It is used for reference, generally applied in feedback circuits. Take Voltage regulated power supply circuit for instance, to keep output voltage in a permanent state, a part of voltage from output voltage as reference (usually using the form of sampling resistors), if output is high, the input end automatically lowers voltage to make output less; if output lower, the input end automatically boosts voltage to make output higher. Current sensing resistors are generally used in power supplies for electronics, digital products, mechanical and electrical products, etc. You will see lots of sampling resistors in many electronics.

Current sensing resistors usually are precision resistors with features of low resistance value, high precision, the tolerance is within ±1%. If higher requirements, precision of ±0.01% will be in need. SMD high precision resistors are in great demand to meet the requirements automatic manufacturing of small products.

We know the unit of resistors are ohm, and resistance value is usually below 1ohm for current sensing resistors. Some current sensing resistors require sampling voltage, then large resistance value resistors are required, if resistance base is large, the tolerance will be large. High precision resistors should be chosen. 

Current Sensing Resistors for Power Supply

How to Distinguish the Resistors?

Resistors have different styles and how to distinguish them clearly? They can be distinguished according to materials, function, etc. Today I will introduce the normal resistors below:
1. Wire wound resistors: Commonly made by winding a metal wire, usually nichrome, around a ceramic, plastic, or fiberglass core. The ends of the wire are soldered or welded to two caps or rings, attached to the ends of the core. The assembly is protected with a layer of paint, molded plastic, or an enamel coating baked at high temperature.

2. Foil resistor: The primary resistance element of a foil resistor is a special alloy foil several micrometers thick, they have the best precision and stability of any resistor available. One of the important parameters influencing stability is the temperature coefficient of resistance (TCR).

3. Grid resistor: In heavy-duty industrial high-current applications, a grid resistor is a large convection-cooled lattice of stamped metal alloy strips connected in rows between two electrodes.

4. Carbon film resistor: Deposited on an insulating substrate, and a helix is cut in it to create a long, narrow resistive path. Varying shapes, coupled with the resistivity of amorphous carbon (ranging from 500 to 800 μΩ m), can provide a wide range of resistance values.

5. Metal film resistor: Metal film resistors are usually coated with nickel chromium (NiCr), but might be coated with any of the cermet materials listed above for thin film resistors. Metal film resistors' precision is higher than carbon film resistors, and stable, noise and TCR is small, usually widely used in instrument measuring appliances.

Of course, there are other resistors in this resistor industry, and too many electronics or equipments need resistors, customized resistors are also available according to industry requirements. Even the newest AI technology, high precision resistors are in great demand.

Are You Only Interested in Famous Brands When Buying Expensive Electronics?

Quality is the other element people are willing to choose. Service is also the key element in the consideration. Electronic products has their features and they generally used for a long time, and sellers usually promise 12 months warranty to attract consumers. Actually good products have longer time in use if you operate correctly.

According to the survey, people appeal to higher requirement in consumption as material life level is improved and the spiritual life are keeping up with it. Higher quality and personalized products are very popular among people. For every family, household is an indispensable part in decoration. Famous brands are welcomed than infamous. For instance, TV, they love Samsung, Skyworth, TCL, and so on. These famous brands researched and developed more and more good products for the market and provide better service for their consumers. Computers, they prefer Apple, Lenovo, Dell, HP, etc. Even fridges, washing machines, air conditioners, all the same situation in the markets.

Each grow-up brand has a hard and rough time and finally accept by customers is a long story. But new brand should learn from them: supplying good products, good services, reasonable prices, brands will be received popular recognition. Next famous brand will be you.

Just like resistor supplier - Microhm, they insist on products and service, never relax the requirements for quality, they have good reputation in the electronic components all the time. They supply high precision resistors and shunts to customers. They have a series of resistors like golden film resistors, thin film resistors, etc. All are very popular among brand electronics.

Hospitals Bring in Robots to Complete the Medical Work

Are you excited to hear about this news? Robots can help finish the medical work in the hospitals. It will really help the doctors effectively.

I still remember last time I went to hospital and quite impressed with the long queue in every windows. Some windows are quick but when I took medicines in the pharmacy, I really wait long time - the whole afternoon. During the period, one thing I have to mention is that each pharmacist was working and dispensing various medicines without rest, even had no time to drink. The patients were not willing to wait too long as they still had arrangements: picking up kids from school, go back to work, etc.

If Robot brought in, pharmacists will be liberated totally, at least they can have a little rest instead of high intensity work. Now a robot named "Big White" works in Wuhan Xiehe Hospital which installs high precision resistors. This robot can automatically charged if no power, half-person tall, half a meter wide, volume 190 liters, burden 200KG, mainly responsible for delivering medical consumable materials, instruments, medicines.

After receiving the index from operation room, it walks to warehouse or supplying room, while store keeper verifies, scan the code and get the items and deliver them to operation room. Sounds Cool, right? Moreover, Big White hardly makes mistakes and high-efficient, absolutely reduce the labor cost.

Big White is very smart, it can calculate the cost and analyze the medical consumable materials, AI revolution is coming, let's welcome it. Let's walk into new era. 

Robot Works in the Hospital

Microhm Power Resistors Widely Used in Power Equipments and White Goods

Definition: A resistor is a passive two-terminal electrical component that implements electrical resistance as a circuit element. In electronic circuits, resistors are used to reduce current flow, adjust signal levels, to divide voltages, bias active elements, and terminate transmission lines, among other uses. 

Resistors not only require resistance, but also power. In large scale applications, the power requirements are not stressed as the current through resistors are quite small, however, low-power resistors cannot be applied in power equipments and white goods. What you need is high-power resistors.

Factory power resistors use foil technology, mounting through hole, SMD with high precision. High quality and cost power resistors give people and electronics more options to improve.

More and more better resistors like power resistors mentioned, SMD resistors, thin film precision chip resistors, busbar with shunt resistors are provided in the future. 

Microhm Power Resistor

Microhm Shunts Applied into Base Station

    Shunts are used for test direct current, they are made according to the voltage between resistors' two ends when direct current passes resistors. Shunts are actually a resistor with small resistance value, when direct current passes through, it will has voltage drop to show on DC ammeter. Shunts are also widely used in a variety of large devices such as communication base stations, green energy resources, medical equipments, etc.

    Those potential industries need high precision resistors, shunts, and so on. They need precision data for work. Then high precision shunts are born for that.

    Microhm as a professional supplier and manufacturer, provides a variety of high precision resistors/shunts with techniques of electron beam welding, foil, wire-wound, etc. As per different requirements, customized resistors can be made.

Shunts Features

Shunts for Base Station

Microhm Precision Resistors Applied in Consumer Electronics

Household appliances are full of a family in the modern times and smart home automation are more and more popular nowadays.

Electronics finds their way into every family. One of components - Resistors - are widely used in many electronics products: fridges, freezers, air conditioners, washing machines, etc. Such electronic products are large and require high quality components - Microhm high precision resistors.

High precision resistors has high requirements, which mainly reflects in some indexes reach the standards: Resistance value error, thermal stability(temperature coefficient), distributed parameter, and so on.

Usually resistance above 1Ω, the precision range is±0.5%, resistance below 1Ω, ±1%, but what Microhom can do exceeds this standard, the precision can be ±0.05%, ±0.1%. That achievement was made through resolving key technical problem by Research & Development Team, which aimed at providing first-class resistors for customers.

Microhm Resistors

Best High Precision Resistors for Computers, Tablets and Peripherals

You cannot accept an expensive computer with a cheap and low resistors, right?

Before you buy a computer and want an wonderful experience, you expect everything even a small component like resistors are best, right?

We all know it’s worth every penny of it, each product has branded manufacturer. For example, Apple, HP, DELL, Lenovo are famous brands on computers.

First, let us learn what is a resistor and where to use usually.

A resistor is a passive two-terminal electrical component that implements electrical resistance as a circuit element. In electronic circuits, resistors are used to reduce current flow, adjust signal levels, to divide voltages, bias active elements, and terminate transmission lines, among other uses.

Microhm Resistors

Resistors are quite important in PCBA part, which was embedded by SMT or welding. Microhm is also a famous manufacturer in researching and developing Thin Film Precision Chip Resistors I want  to stress. They have mature team and over 10+ years industry experience. Their resistors are not only sold in domestic also overseas. High Quality resistors are applied on computers, tablets, notebooks, ultrabooks, embedded systems, UPS, solid-state drives, networking switches, routers and peripherals like wall chargers, car chargers, wireless chargers, graphic card, printers and so on.

This is a brief introduction of resistors for computers and peripherals, next time I will introduce resistors for other industries. 

Training Classes for We Business in Guangzhou

[Essay]
2-day training classes for We Business was held in headquarter of KT group in Guangzhou, we were so lucky to have this rare opportunity to study.

KT is a company going for beauty industry for more than 5 years and it is a pioneer in We Business. R&D department developed a marvelous product - Deep Cleansing Mask, in the beginning, the mask need 6 hours to effect, but the effect is very obvious. The wind swept across the Moments and mask was all the rage at the time. KT became a beacon in the beauty circle.

At the mid of November in 2017, KT upgraded masks again and launched the 5th generation mask, it takes a new pattern to expand the business - cooperate with physical stores. That is very helpful for people who want to start business, but it seems easy as too many people found many people open their shop in Moments. After listening to teacher Li's class, I learned that it was totally wrong. You need devoted to yourself and run like a business, let's see How to Build Your Moments:
1. You photo must be professional and charming, and yourself.
2. Your cover must be positive, attractive and encouraging.
3. Your Moments must be interesting and full of positive energy.
4. The law of two to eight. It is not good to exhibit ads all the day, better 20% of ads, 80% of personal display: interests, sharing, love. If all ads, your friends will screen your messages.
5. Conclusion. You should let people know you are changing and changing better and better when doing We Business. Share your success with people.

Building your Moments is building your dreams. If you want success, you should make your efforts to go. Anything is easy, if you want master something, spend time on it.

The second day, KT help us to design personal image to improve ourselves. Make VI for us, and take a video for every one. Really different and fantastic. Everyone is happy.

Finally, let's end with the collective photo.

Shunt Resistors Integrated with Busbars Used for Cars

[Everyday Fresh]

Somebody maybe never hear of Shunt Resistors and don't know what it is. Now here are a brief introduction.

Busbar shunt resistors: Shunts are weld on busbars, and shunts can sense the temperature coefficient of resistance ±50ppm/k, ≥800A current. And the voltage drop between the end of busbar and resistor can be measured. And the shape of busbars can be customized. 

This time I want to take the shunt resistors I got for example:

    Shunts can be weld to busbars to reduce the quantity of components;

    Compared with resistors fixed by screws, the heat drops;

    When designing ultra low resistance, it can be used for testing high sensing current;

    Use Kelvin connections to realize high precision sensing;

    Proper busbars can be designed according to applications.

Where can be applied:

    Sensing current and monitor for cars, industrial devices, energy;

    Home and industrial battery management;

    Inverter current control.

These are industrial electronic components, more and more good products will be invented in the future. 

Shunt Resistors for Cars

First Time to Experience Deep Cleansing Mask

Yesterday my tutor I knew last year sent me a new personal care, as a lazy person I did not care much about it. But I tried it - KATAVIER Deep Cleansing Mask, that's AMAZING! I want to record and share here.

Firstly let us view the product features:

• Masks use coconuts to make, safe and non-toxic, looking like jelly, can put it on the face for whole night;
• Effectively to absorb blackhead, acne, dirt, acarid, cosmetic Residue even the first time use;
• Deep cleansing mask can open pores quickly, encroach skin?in-depth, transport nutrition and adjust oil/hydro-balancing;
• Completely easy to use mask that comes with basic instructions, you can put it to use right out of the box;
• Before you use the mask, take a little on the inside of the wrist, or behind the ears, half an hour after the adverse reactions. On the contrary, over 10-15 minutes, you can apply the mask.

That attracted me totally as they are natural coconut made. I don't like chemical things which to some degree is a little unsafe to me as I am allergic actually. 

Secondly I used it according to the way my tutor told me: 
Step 1: After wash your face, get the mask out of bag (No need wash your face, as our mask is cleansing mask;
Step 2: Take top and bottom layers, put the flexible and semi-transparent peptides mask on your faces;
Step 3: Mask till the mask is totally dry, it usually takes 25-60 minutes, depending on the absorption of people's skins;
Step 4: Put the mask into the water for 10 seconds, you will find the dirt on the mask.

Honestly I feel doubtful about this mask as I used a lot of masks...After I used one last night, guess what happened finally! It seemed I never washed my faces ever!! Mask was very dirty you could see oil, blackheads, dirt there. Pictures fyi. Take a deep breath and please don't abandon me: