This circuit was found in a Hands On Electronics from the 90s. It is intended to supply old tape players to batteries with a voltage of 7.5 V from the 12 V of a car battery or source.
This configuration is traditional and can be found in many other circuits in this section. The...
Using a standard multimeter, this circuit from a 73 magazine for radio amateurs provides an output...
This circuit is indicated for supplying the CB17495E transmitter. The BD135 must have a small heat...