This simple circuit consists of a blinker for a very low consumption neon lamp, found in a 1982 documentation. The circuit can be powered by 110 V for 1N4004 diodes or 220 V for 1N4007 diodes.
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...