The circuit is from the manual of the integrated circuit used in the excitation of power transistors. The 30 V symmetrical supply should have a few amps of capacity.
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...