Audio Squelch (CB7394E)

This squelch circuit used in transmitters was found in a magazine for radio amateurs 73 in the 1980s. The circuit admits equivalent components.

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Hand Dryer (CB18786E)
With this circuit it is possible to use a common hair dryer as a hand dryer. The circuit is timed...
1kW x 10 kHz sinusoidal converter (CB20999E)
This circuit was obtained from an American documentation from the 90's. Inductors are critical...
Multiplexed mixer (CB20762E)
This configuration from the 1970s can be applied to modern equivalent operational amplifiers. The...