Found in old documentation, this circuit has only the most difficult component to obtain the PUT. The sensors are electrodes placed in the reservoir. The circuit directly controls an AC power load.
This mono circuit for 10 LEDs was found in the January 1991 Radio Electronics magazine. It is...
This circuit was obtained from an Electronic Design of 1968. The circuit uses components of the...
We found this circuit in the Linear Applications Handbook published by National Semiconductor in...