Found in Popular Elecronics, this configuration also appears in this section, but obtained from other sources. The 14.4 V supply allows the circuit to be used in the car.
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...