This TV remote control receiver uses a ratchet system to activate an old drum-type selector to change channels. A common system at the time. The circuit is from a Radio Electronics from February 1961.
This circuit turns on a lamp when the night comes and turn it off in the morning. The circuit...
This circuit was obtained from an American publication of the 80's. The integrated circuit is of the...
In the figure we have a traditional flip-flop configuration implemented with two operational...