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Classification of resistors

  1. Wire wound resistors: general wire wound resistors, precision wire wound resistors, high power wire wound resistors, high frequency wire wound resistors. 2. Thin film resistors: carbon film resistors, synthetic carbon film resistors, metal film resistors, metal oxide film resistors, che... Read More

Varactor diode

The varactor diode is a special diode specially designed according to the principle that the junction capacitance of the “PN junction” inside the ordinary diode can change with the change of the applied reverse voltage. The varactor diode is mainly used in the high-frequency modulatio... Read More

Inductor

Inductor is commonly used in the circuit “L” plus a number, such as: L6 means the inductance number 6. Inductive coils are made by winding insulated wires around a certain number of turns on an insulated skeleton. DC can pass through the coil, the DC resistance is the resistance of th... Read More

Capacitor

1. The capacitor is generally represented by “C” plus numbers in the circuit (such as C13 means the capacitor numbered 13). The capacitor is composed of two metal films close to each other, separated by an insulating material in the middle. The characteristics of the capacitor are It ... Read More

PCB flying probe test operation skills

This article will share techniques such as alignment, fixing, and warping board testing in flying probe test operations for reference only. 1. Counterpoint The first thing to talk about is the choice of counterpoints. Generally, only two diagonal holes should be picked as counterpoints. ?) Ignore... Read More

PCB short circuit improvement measures —fixed position short circuit

The main reason is that there is a scratch on the film line or a blockage on the coated screen, and the exposed copper on the fixed position of the coated anti-plating layer causes the PCB to short-circuit. Improve methods: 1. Film negatives must not have trachoma, scratches, etc. The drug film s... Read More

Features of PCB micro-hole mechanical drilling

Nowadays, with the rapid updating of electronic products, the printing of PCB s has expanded from the previous single-layer boards to double-layer boards and multi-layer boards with higher precision requirements. Therefore, there are more and more requirements for the processing of circuit board ... Read More

Some small principles of PCB copying process

1: The basis for selecting the width of the printed wire: the minimum width of the printed wire is related to the current flowing through the wire: the line width is too small, the resistance of the printed wire is large, and the voltage drop on the line is large, which affects the performance of... Read More

Why your PCB is so expensive? (II)

  4.Different copper foil thicknesses cause price diversity (1) The smaller the quantity, the more expensive the price is, because even if you do 1PCS, the board factory has to do the engineering information, and out of the film, no process is indispensable. (2) Delivery time: The data deliv... Read More

Why your PCB so expensive? (I)

Part: various factors that affect the price of a PCB board The price of PCB has always been a puzzle to many buyers, and many people will wonder how these prices are calculated when placing orders online. Let’s talk about the components of PCB price together.   Different materials used in ... Read More

Spacing Requirements on Designing pcb

  Electrical safety distance   1. Spacing between wires According to the production capacity of PCB manufacturers, the distance between traces and traces should not be less than 4 mil. The minimum line spacing is also the line-to-line and line-to-pad spacing. Well, from our production point of v... Read More

India and southeast Asia outbreak escalation, how much impact on the electronics industry chain?

Since mid-to-late march, affected by the global spread of the epidemic, India, Vietnam, the Philippines, Malaysia, Singapore and other countries have announced “city closure” measures ranging from half a month to a month, causing investors to worry about the impact of the global elect... Read More
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