This power supply for model railroad was found in a February 1961 Radio Electronics Magazine. The transistor must be mounted on a heatsink and the transformer is a 1,5A secondary winding.
Using a DAC038 IC this circuit is from Radio Electronics from May 1983. The circuit must be...
This circuit with traditional discrete components was found in a 1990 documentation. The circuit can...
This circuit is from an American 80's documentation. The circuit indicates when the voltage of a 9 V...