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.
Using a new Maxim integrated circuit (www.maxim-ic.com) the amplifier shown in the figure can be...
With this relaxation oscillator with a neon lamp we can generate small intensity audio signals for...
This configuration was found in a publication for radio amateurs in 1979. The two integrated...