This circuit is from a 1980s Motorola documentation. The circuit can be set to fire from 60 to 120 V DC or from 42 to 84 V AC. The circuit has a forehead button that activates an indicator lamp.
Currents of a few tens of milliamps can be obtained with this simple source that makes use of an...
This circuit was obtained in a 1990 English magazine. The circuit can be assembled with equivalent power...
This circuit is recommended by Texas Instruments in the datasheet of the TL317, equivalent to...