This circuit is from a July 1970 Radio Electronics magazine. The sensors are metal probes. The 18 V power source must be isolated from the mains.
This circuit is intended to increase the width of a pulse. The circuit is TTL and can be used as a...
What is the voltage of a zener diode recently removed from the scrap box and without any markings? If...
We found this circuit in the August 1974 issue of Radio Electronics magazine. The power transistor must...