In the figure we have a 9V source using a 5V 7805 regulator. The circuit is from an American documentation from the 90s. The circuit has a 12V input. The maximum current is 1 A.
This TTL circuit was found in the December 1990 issue of Radio Electronics magazine. The circuit has...
Found in an Electronics World of 1968 this circuit can use any SCR and diodes depending on the...
Placed near a telegraphic transmitter (CW) and with a small antenna or pickup, it reproduces the...