Found in an Electronic Design from the 1990s, this circuit generates signals from 500 kHz to 1 MHz that are digitally synthesized to provide a sinusoidal output.
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...