How to control the start-stop of 220V ac motor with a single chip? What type will you use for the relay
The digital output of the single chip is high and low, which can be used to control the power or power failure of the cable, so as to make the contact of the relay contact or break. The relay parameters include two main points. Line pack voltage, contact voltage current. Also consider the volume and connection mode. 3, line pack voltage, 5V, 9V, 12V, etc. Let the coil be connected to the voltage. The simple solution is to control NPN directly. Vcbo, the CEO of Vcbo generally meets the requirements. The current amplification and dissipation power are sufficient to satisfy the line package drivers. The contact point is usually dc voltage current, ac voltage current each set of parameters. According to the actual power failure flow choice. 5, with the line package voltage parameter, the contact parameter, the simple judgement of the volume size, select the relay of the good brand, such as omron. Wish you success!
The relay is ok, I use 12V voltage relay, 5V control. The model is not seen. The relay is supposed to be weak. It's isolated.
The current amplification comes directly with a triode, which is based on the control voltage of your relay. The 12-24v dc relay is usually selected. The protective circuit of heat relay is optional according to need.
First, the control signal is used to decouple the output, which is amplified by the current to drive the relay. The relay type is chosen according to the size of the motor.
