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Continue from Last Chapter: Misunderstanding 2: Reliability Design

Common mistake 7: This single board has been produced in small batches, and no problems have been found after a long time of testing, so there is no need to read the chip manual. Common Mistake 8: I can’t be blamed for user operation errors. Positive solution: It is correct to require the user to... Read More

Electronic engineers often make mistakes (1) How many things have you done wrong?

Misunderstanding 1: Cost saving Common mistake 1: What color should the indicator light on the panel choose? I personally prefer blue, so choose it. Positive solution: For the indicator lights on the market, red, green, yellow, orange, etc., regardless of size (under 5MM) and packaging, they have... Read More

What to do if the PCB is deformed

For the pcb copy board, a little carelessness may cause the bottom plate to deform. If it is not improved, it will affect the quality and performance of the pcb copy board. If it is directly discarded, it will cause cost losses. Here are some ways to correct the deformation of the bottom plate.  ... Read More

A small trick for multimeter testing SMT components

Some SMD components are very small and inconvenient to test and repair with ordinary multimeter pens. One is that it is easy to cause a short circuit, and the other is that it is inconvenient for the circuit board coated with an insulating coating to touch the metal part of the component pin. Her... Read More

Analysis of electrical faults in good times and bad times

In terms of probability, various electrical faults with good and bad times include the following situations: 1. Poor contact Poor contact between the board and the slot, when the cable is broken internally, it will not work, the plug and the wiring terminal are not in contact, and the components ... Read More

Characteristics and judgment of resistance damage

It is often seen that many beginners are tossing on the resistance while repairing the circuit, and it is dismantled and welded. In fact, it has been repaired a lot. As long as you understand the damage characteristics of the resistance, you don’t have to spend much time.   Resistance is th... Read More

pcb in a panel skill

1. The outer frame (clamping side) of the PCB jigsaw should adopt a closed loop design to ensure that the PCB jigsaw will not be deformed after being fixed on the fixture; 2. PCB panel width ≤260mm (SIEMENS line) or ≤300mm (FUJI line); if automatic dispensing is required, PCB panel width×length ≤... Read More

Why spray paint on the circuit board?

1. What is the three-proof paint? Three anti-paint is a special formula of paint, used to protect circuit boards and related equipment from environmental erosion. The three-proof paint has good resistance to high and low temperature; it forms a transparent protective film after curing, which has ... Read More

Common sense and methods of PCB inspection: look, listen, smell, touch… ​

Common sense and methods of PCB inspection: look, listen, smell, touch… ​ 1. It is strictly forbidden to use grounded test equipment to touch the live TV, audio, video and other equipment of the bottom plate to test the PCB board without an isolation transformer It is strictly forbidden to ... Read More

electrically conduc- tive printing ink notes

According to the actual experience of ink used by most manufacturers, the following regulations must be followed when using ink: 1. In any case, the temperature of the ink must be kept below 20-25°C, and the temperature cannot change too much, otherwise it will affect the viscosity of the ink and... Read More

Is the “gold” of gold fingers gold?

Gold Finger On computer memory sticks and graphics cards, we can see a row of golden conductive contacts, which are called “golden fingers”. The Gold Finger (or Edge Connector) in the PCB design and production industry uses the connector of the connector as the outlet for the board to... Read More

What exactly are the colors of PCB?

What is the color of the PCB board, as the name suggests, when you get a PCB board, the most intuitively you can see the oil color on the board, which is what we generally refer to as the color of the PCB board. Common colors include green, blue, red and black, etc. Wait. 1. Green ink is by far t... Read More
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