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.
This circuit was found in Texas Instruments documentation from the 1980s. The circuit has a Q less...
This circuit is from an English publication from 1978. The operational admits equivalents and the...
P1 on this Radio Shack circuit is a 6 V lamp with current up to 500 mA depending on Q2. The...