This small transmitter appeared in the March 1989 issue of Radio Electronics magazine. The two-transistor circuit used an electret microphone and had a range of a few dozen meters.
) This circuit was found in an English publication in 1990. It can still be easily assembled using a...
This powerful 50-joule xenon flasher was found in Ferranti's 1965 documentation. The circuit makes use...
We found this circuit in a documentation from the 90s. The integrated circuits are from the time,...