Circuit Project Electronic

This is a design for protection voltage. This circuit is called as high and low voltage cut off. The circuit is using time delay for cut off the voltage. This is a low cost and reliable circuit for protecting such equipments from damages. This is the figure of the circuit.
Whenever the power line is switched [...]

The delay time is adjustable between fifteen seconds and ten minutes. There is an LED to indicate operation, and there is an AC output to attach to whatever you wish to control. When the timer runs out, it will switch off whatever is attached. Read More

That be On After Delay Circuit. I uses mosfet in the circuit for delay easy more than the transistor. By have the work of the circuit be when press , S1 , an electric bell will not loud suddenly , must wait for follow the period of time that note. [...]