This circuit was published in a recent magazine as a past project. It is a crystal radio from October 1986 Radio Electronics magazine. The article detailed the assembly.
Using transistorized regulators with NPN and PNP transistors we can create a symmetrical source of...
This circuit was found in a 1997 documentation. The signals are adjusted in a double 555 (556) and the...
We find this circuit in a 1980s documentation for amateur radio. The circuit shows how to switch...