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 found in the Spanish magazine No longer in existence, Mundo Electrónico, in a...
This circuit that has a response from 10 Hz to 700 kHz was found in Philips documentation from 1968. Dual...
This simple sweep generator circuit has been found in older documentation, but can still be easily...