Here is a timer I designed for a friend. He wanted to have a fan run for 1, 2, 3 or 4 hours.
The precedure is - press the button to start. Fan runs for the preset time then the relay is released & the power is switched off.
I have attached the circuit & the PIC software. Hope this helps.
The precedure is - press the button to start. Fan runs for the preset time then the relay is released & the power is switched off.
I have attached the circuit & the PIC software. Hope this helps.