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.
I found this circuit in a Popular Electronics from November 1999. The magazine is no longer...
This circuit, from a Motorola manual, uses transistors from the time, but can be implemented with...
This circuit was found in a 1986 publication. The speed of the effect is determined by the 555,...