Found in a 1990s American documentation, this circuit provides an output voltage approximately 4 times that of the input voltage. Diodes are general-purpose types.
In this circuit found in a 1991 publication we can use the 2N2646 unijunction transistor and the...
This circuit transforms your low sensitivity analog multimeter into an electronic voltmeter with...
This 10-step voltage indicator was obtained from a 1980s publication. The circuit is based on an...