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, which uses an unusual integrated, is from the Motorola Linear Databook of 1990....
This circuit is used to test an inductor (coil) allowing the observation of its opration in an R-L...
This analog to digital converter was obtained from an American documentation from the 90s. Used...