This bench circuit generates signals with frequencies determined by the settings and selected capacitors. The circuit was found in a Radio Electronics from January 1959.
Suggested for the control of photographic enlargers, this 1967 General Electric circuit uses still...
We found this alarm in a 1992 documentation. The circuit has several timings and the relay can...
This is a circuit for testing small lamps and LEDs. The lamps that can be tested are the ones...