Found in a Popular Electronics from the 80's, this circuit makes use of a time integrated to control a relay in a timed way. R2 determines the activation time.
This adjustable circuit from 0 to 200 nA was found in a 90's EDN. The components can still be...
Flybacks are no longer misused. However, if the reader wants to recover an old analog television...
This circuit makes use of a stroboscopic tube, a component that no longer exists today. The...