This amplifier was found in a 1970s documentation. Darlington transistors can be replaced for modern equivalents of at least 80 V x 2 A, equipped with good heat sinks.
This circuit was found in a 2006 publication. It uses discrete components and CMOS that are still...
We found this circuit in the November 1992 issue of Radio Electronics magazine. The circuit has...
This simple circuit, from a 2006 documentation, activates a 12 V lamp in the event of a power...