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.
Passaje Alarm This locking circuit was found in a 1988 publication. It locks a relay when the...
Found in a publication for radio amateurs from the 1980s, this circuit amplifies signals in the 60...
We found this circuit in an application note from Linear Technology of the 90s. The circuit uses...