Described in the December 1969 Radio Electronics magazine, this circuit is intended to supply the previous circuit. The circuit is not isolated from the power grid.
This circuit for a 16-channel infrared transmitter was found in the August 1984 issue of Radio...
We found this circuit loader in a French magazine Electronique Radio Plans from July 1993. The...
This charger is from an old publication of 1975. The PNP transistor can be the BC558 and the NPN...