This circuit that appears in other points of this section and on this website serves to activate a lamp in the event of a power failure. This version is from 1967 documentation by General Electric.
April 2017 - Mouser Electronics already has the MAX4007 from Maxim Integrated in its inventory, an...
This circuit was obtained from an English magazine from 1979, but can be easily assembled today...
Found in a 1978 publication, this circuit uses germanium transistors and drives a small 20 to 50...