This multi-output power supply was found in an article in Radio Electronics magazine in November 1985. Voltage regulators must be equipped with heat sinks.
This circuit is from an 80's documentation. The transistor can be any general purpose PNP and the...
This powerful pushbutton uses a power MOSFET. We found it in a Popular Electronics magazine from...
This shield circuit for lamps and other charges was found in a Popular Electronics from the 90's....