Interval Timer
This versatile timer can be adjusted to switch a device on or off at the end of a timed period, the timedelay can be adjusted via 2 onboard variable resistors.
Time delays of 1 second to 4 hours and above are possible by adjusting the values of R1, R2 and C1. By fitting a link in place of S1 it is possible to make the timer retrigger and cycle the time delay continuously.A mains rated relay could be connected OFF BOARD to control mains appliances.
