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.
In the figure we have a simple way to obtain (almost) sinusoidal signals from an integrated...
This circuit is from an old Mullard transistor manual. The diodes are made of germanium and the...
Found in a Popular Electronics from the 90's, this circuit makes use of an integrated from the...