It is a 13.8 V x 10 A regulator obtained in a 2008 documentation. The 2N3055 transistors must be mounted in excellent heat sinks and the voltage is adjusted in the trimpot.
This is another practical idea found in a 1997 documentation. This circuit allows a DJ to change the...
Found in a 90s Popular Electronics, this circuit can power a miniature railroad with voltages of 15...
Based on the frequency of the power grid, this circuit produces square signals for use in digital...