Found in Popular Electronics from the 90s, this circuit turns off an appliance at the end of the programmed time. The 12 V relay must have contacts according to the controlled current.
This circuit was obtained from an English magazine from 1977. The magazine no longer exists, but...
The two damped oscillators shown can be adjusted to generate the drum sound when we touch the...
Timings of up to 10 hours, depending on the capacitor used, can be obtained with this circuit that...