Found in a 90s Electronic Design, this circuit produces adjustable pulses that start after an adjustable interval. The circuit can be implemented with modern equivalent components.
This circuit triggers the LED when the monitored battery voltage drops below 9 V for 12 V...
We found this circuit in a Radio Electronics from January 1967. The SCR is already the C106, which...
This power source with silicon diodes at a time when valves were still used was found in Radio...