[color=black][font=Verdana] In the production of [/font][font=Verdana] electronics, in order to reduce the volume and reduce the cost, the capacitor step-down method is often used to replace the bulky
I want to make an automatic tracking smart car with black lead wires. Is it better to use a three-way infrared tube or a photoelectric sensor chip RPR220? I initially plan to use C51 to write it. Whic
This is a triode circuit. When the LOCK signal is input, the relay is closed through this triode. This circuit has been used before, and another board was made. However, when the lock signal is input,