For metal buttons, it is very important to solve them in time if they are not bright during use. What are the solutions to the problem?
Because the circuit control loop is very long in different electrical workplaces, the signal indicator light is not very bright at this time, which is basically caused by induced voltage.
1. A small capacity of 0.01_0.22UF is merged at the input and output ends of the line, and the input end is connected in parallel with a 100K_500K resistor. It is inconvenient to operate.
2. Add an RC circuit. Many contactor coils are also connected in parallel with this circuit, which is used to absorb the induced electromotive force. This is also a reasonable solution.
3. Each indicator lamp uses a shielded wire, but it is not very beautiful.
4. Add a resistance-capacitance absorber, which has the advantages of simplicity, convenience and cheap things.
Therefore, the situation that the metal button is not lit can be solved by these methods.
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