This circuit is from the 80's, using an integrated of the time. The circuit serves as a reference, as this type of dialing is no longer used today.
This small receiver for the medium wave range was found in Radio Electronics magazine from July...
In the figure we have the way to reset (turn off) an SCR using a push button switch on a...
This 80's circuit has been winning. It is a 1 000 gain sample and hold circuit and an offset...