This circuit was obtained from Popular Electronics from June 1978. It doubles the input DC voltage. Obtained current is very low, serving only for polarization circuits.
This circuit was found in RCA documentation from the 1960s. It supplies two voltages from a single...
This circuit was obtained in a 1978 publication. The SCR may be the TIC106. What it does is act as a...
Found in a 1990s US publication, this alarm circuit detects when a light beam is interrupted. Optical...