This flip-flop with neon lamps was found in a 1969 publication that deals precisely with neon lamps. Observe the high supply voltage.
This circuit synthesizes the tick of a metronome with the speed controlled in RV1. The circuit is...
This source is more elaborate than the previous one because it uses two transistors. The source is...
This simple preamplifier was published in Radio Electronics magazine in February 1958. The battery...