A complete list of PCB component procurement
FS Technology is a company with strong pcb component procurement capabilities. Our understanding of PCB components is the strongest in China. In order to demonstrate our capabilities in this area, we have prepared some component-related knowledge:
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Resistance
In the circuit, the resistance is represented by "R" plus a number, such as: R3 represents the resistance numbered 3. In the circuit, the current has the following functions: shunt, current limit, voltage divider, bias and so on. Parameter identification: The unit of resistance is ohm (Ω), and the unit of magnification is: kiloohm (KΩ), megohm (MΩ), etc. The conversion method is: 1 megohm = 1000 kiloohm = 1000000 ohms. There are 3 ways to label the parameters of the resistance, namely the direct labeling method, the color labeling method and the numerical labeling method. The number scale method is mainly used for small-volume circuits such as patches, such as: 472 means 47×100Ω (ie 4.7K); 104 means 100K.If you are looking for a suitable PCB company to buy assembly services, FS Technology is a good choice, here are the certificates we have obtained.
Certificates obtained by FS Technology
Capacitance
Capacitors are represented by "C" plus numbers in the printed circuit board industry, for example: C12 represents the capacitor numbered 12. Capacitors are pcb electronic components composed of two metal films close together and separated by insulating materials. Its characteristic is mainly to block DC and AC. The capacity of a capacitor represents its ability to store electricity. The blocking effect of capacitance on the AC signal is called capacitive reactance, which is related to the frequency and capacitance of the AC signal.
Identification method: The identification method of capacitance is basically the same as that of resistance, and it is divided into three types: direct marking method, color marking method and number marking method. The basic unit of capacitance is expressed in farads (F), and other units are: millifarads (mF), microfarads (uF), nanofarads (nF), and picofarads (pF). Where: 1 farad = 103 millifarads = 106 microfarads = 109 nanofarads = 1012 picofarads. The capacitance value of the capacitor with large capacity is directly marked on the capacitor, such as 10 uF/16V
Crystal diode
FS Technology uses "D" plus a number to represent crystal diodes, for example: diode number 5 is D5.
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The role of crystal diodes in PCB assembly
Certificates obtained by FS Technology
The main function of the diode is to conduct electricity in one direction. That is to say, the lower the forward voltage is, the smaller the on-resistance is. The opposite is true for reverse voltage. Because the crystal diode has such a function, it is often used in PCB assembly circuits such as rectification, isolation, voltage regulation, polarity protection, code control, FM modulation and noise suppression in wireless printers. The crystal diodes used in printers can be divided into: rectifier diodes (such as 1N4004), isolation diodes (such as 1N4148), Schottky diodes (such as BAT85), light-emitting diodes, and Zener diodes. If you need to find a Turnkey PCB Assembly company to help you buy the above components, FS Technology is a good choice, we have the strongest suppliers in the world.
How to Identify Diodes in a Line
Identifying diodes is easier than identifying other components. There is a color circle on the surface that marks the N pole (negative pole) of the low-power diode, and the opposite side is the P pole (positive pole). If your diode is a light emitting diode, you can identify its positive and negative poles by the length of the pins, the long pin is positive and the short pin is negative.
How to test pcb electronic components
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When testing the diode, use the red test lead to connect the positive electrode of the diode and the black test lead to the negative electrode of the diode. The resistance value measured at this time is the forward conduction resistance value of the diode. The opposite is true if you are using an analog multimeter.
You can go to the PCBA blog to learn more pcb knowledge, FS Technology, as the best turnkey pcb assembly company in China, we only spread the most professional knowledge.
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