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 circuit is from an old documentation making use of a 3,579,645 MHz analog color television...
The circuit shown in the figure is suggested by Intersil (www.intersil.com) and makes use of the...
This circuit split the voltage of a Power supply allowing it to be used as dual supply. The limit...