Forum

I have no knowledge of electrical or electronic circuit diagrams. The circuit diagram above seems to turn a small light bulb on and off with a battery of 6V. I want to turn this into a circuit that turns a 220V incandescent light bulb on and off with 220V electricity. And I wonder if there is any problem with the operation of the PIC chip in the circuit diagram when it is changed.

Hello, I am a person who is going to conduct an amplification circuit experiment using the instrumentation amplifier ad620 element. The circuit diagram says that +9V -9V voltage should be applied to the ad620 device, but I don't know how to apply the -9V negative voltage. Please advise on the simplest way to apply +9V ,-9V voltage. And, if possible, it would be appreciated if you could explain why you need to apply two + and - voltages.

hello In a conductor there are free electrons, If only the positive electrode (+), which has a higher potential than the conductor, is connected at one end, the free electrons in the conductor will all go to the positive electrode, will there be no free electrons in the conductor? If it is impossible, please explain why it is impossible. and, At the positive pole of a conductor connected to a power source and through which current flows, Do free electrons pass through the interface of the conductor and enter the anode?