This battery charger circuit was found in the August 1970 issue of Radio Electronics magazine. The circuit uses 4 transistors. Q1 must be provided with a good heat sink.
The reference voltage determines the output voltage on this circuit which has a maximum current of 5 A....
This filter of two transistors has the cutoff frequency determined by the formulas next to the...
July 2017 - Ricoh's new 200mA R1524x voltage regulators are available from Mouser Electronics with...