This circuit was found in a Popular Electronics from the 80s. It is possible to control a relay from a video signal. The circuit was used in video recorders of the time.
The circuit presented uses Linear Technology Operationals, having been found in a 1993 manual. The...
The amplitude of the output signal of this amplifier is proportional to the hub of the input...
Using the 709 integrated circuit, one of the first operational, this circuit was found in the...