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 a National Semiconductor manual that is now a Texas group company. The...
We found this 5-digit circuit in a 1990 publication. The displays are of a common cathode and the...
This experimental radio was obtained in an old Argentine publication. Germanium transistors are...