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 is from 1997 documentation. It uses CMOS circuits to produce the effects, being...
This circuit is from a 1979 documentation. The critical component is the CA3130 operational...
This circuit was obtained in a Motorola documentation from 1968. The circuit uses a power...