Today this frequency corresponds to the end of the FM band. However, in December 1958, when the circuit was published in Radio Electronics magazine it was the frequency used by American satellites.
This circuit causes an instrument needle to oscillate to signal an event. The circuit is powered by...
A touch in this circuit turns-on the lamp or the relay. Power supply is according the lamp or...
This biestable circuit was found in a Popular Electronics from the 90s. The circuit has an unusual...