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Instructions on patch adjustable resistor
Date：2018-09-26
Views：351
Resistor is an indispensable electronic component in a circuit, and there are numerous types of specifications, such as patch adjustable resistance, ceramic adjustable resistance, Panasonic adjustable resistance, etc. So for the patch adjustable resistance, in the actual use process need to pay attention to a lot of details, if you do not have a certain understanding of the patch adjustable resistance to use attention to explain common sense. It is one of the key problems to cause resistance damage, so the next thing to explain today is the use of adjustable resistance patch instructions.
Note on the use of patch adjustable resistor
1. About the adjustable power resistor of the patch in welding, we should pay attention to its welding temperature and time, whether improper operation is easy to put the lead through welding or welding problems.
2. Because the digital adjustable resistor is a high precision component, the flux added in the welding process should not be too much, or too much will easily lead to oxidation of the lead pin of the resistance, which will lead to the problem of virtual welding or poor soldering.
3. The lead pin of the adjustable power resistor of the patch should be carefully operated and connected, and the resistance should not be smashed, so as to avoid the phenomenon that the lead pin of the resistance is easy to break or break.
4. In order to avoid the deviation of resistance position welding and affect its performance, attention should be paid to the operation of welding in the resistance of the solder joint should first detect whether there is a deviation phenomenon, can be operable for welding.
5. Do not overload the rated power of the resistance, and do not increase or reduce the rated power of the non-resistor at will. If not, the allowable error of resistance will be too large.
6. The resistance value and power should be selected according to the specific requirements of the circuit, and the resistance value of the resistance can not be adjusted and changed casually. If the resistance of the regulator is too large or the power is too large, it is possible that the load between the lines can not be compatible, which will directly lead to the possibility of burning resistance.
7. When the digital adjustable resistor of the patch fails, it is necessary to avoid touching the solder joints of the lead wire of the resistance by hand during the line detection, so as to avoid causing electric shock and other safety accidents.
Summary of important characteristics of chip adjustable resistor
1. Resistance characteristics are different at different frequencies: In AC circuits, the same adjustable power resistor presents the same resistance value for different frequencies of the signal, and does not change the resistance value because of the different frequencies of the AC points. This is an important characteristic of the patch adjustable resistance. After understanding this characteristic, the AC circuit is analyzed. When the resistor works, it is unnecessary to consider the effect of AC frequency on the circuit operation; the patch adjustable resistance is not only constant in the sinusoidal AC circuit, but also the resistance presented in the pulse signal, tripod signal processing and amplification circuit.
2. The resistance characteristics of DC and AC circuits are the same: in DC or AC circuits, the resistance of the adjustable power resistor acts as an impediment to the current, in other words, the resistance of the chip adjustable resistor acts as an impediment to the AC and DC current. Therefore, the digital adjustable resistor is good for DC, and the same as the role of AC, which greatly facilitates the analysis of resistance circuit, that is, pure resistance circuit can be analyzed without considering DC or AC.
3. Basic characteristic: consume electric energy. When the current is too big, it will heat up until burn out.
Everyone in the purchase of resistance, we must understand the basic parameters of the resistance, and the resistance specifications and models are also with a certain understanding. If you are talking about the use of the patch adjustable resistance notice that there is something unclear, you can come to consult.
Note on the use of patch adjustable resistor
1. About the adjustable power resistor of the patch in welding, we should pay attention to its welding temperature and time, whether improper operation is easy to put the lead through welding or welding problems.
2. Because the digital adjustable resistor is a high precision component, the flux added in the welding process should not be too much, or too much will easily lead to oxidation of the lead pin of the resistance, which will lead to the problem of virtual welding or poor soldering.
3. The lead pin of the adjustable power resistor of the patch should be carefully operated and connected, and the resistance should not be smashed, so as to avoid the phenomenon that the lead pin of the resistance is easy to break or break.
4. In order to avoid the deviation of resistance position welding and affect its performance, attention should be paid to the operation of welding in the resistance of the solder joint should first detect whether there is a deviation phenomenon, can be operable for welding.
5. Do not overload the rated power of the resistance, and do not increase or reduce the rated power of the non-resistor at will. If not, the allowable error of resistance will be too large.
6. The resistance value and power should be selected according to the specific requirements of the circuit, and the resistance value of the resistance can not be adjusted and changed casually. If the resistance of the regulator is too large or the power is too large, it is possible that the load between the lines can not be compatible, which will directly lead to the possibility of burning resistance.
7. When the digital adjustable resistor of the patch fails, it is necessary to avoid touching the solder joints of the lead wire of the resistance by hand during the line detection, so as to avoid causing electric shock and other safety accidents.
Summary of important characteristics of chip adjustable resistor
1. Resistance characteristics are different at different frequencies: In AC circuits, the same adjustable power resistor presents the same resistance value for different frequencies of the signal, and does not change the resistance value because of the different frequencies of the AC points. This is an important characteristic of the patch adjustable resistance. After understanding this characteristic, the AC circuit is analyzed. When the resistor works, it is unnecessary to consider the effect of AC frequency on the circuit operation; the patch adjustable resistance is not only constant in the sinusoidal AC circuit, but also the resistance presented in the pulse signal, tripod signal processing and amplification circuit.
2. The resistance characteristics of DC and AC circuits are the same: in DC or AC circuits, the resistance of the adjustable power resistor acts as an impediment to the current, in other words, the resistance of the chip adjustable resistor acts as an impediment to the AC and DC current. Therefore, the digital adjustable resistor is good for DC, and the same as the role of AC, which greatly facilitates the analysis of resistance circuit, that is, pure resistance circuit can be analyzed without considering DC or AC.
3. Basic characteristic: consume electric energy. When the current is too big, it will heat up until burn out.
Everyone in the purchase of resistance, we must understand the basic parameters of the resistance, and the resistance specifications and models are also with a certain understanding. If you are talking about the use of the patch adjustable resistance notice that there is something unclear, you can come to consult.