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.
The Motorola MOC501O optocoupler has a complete amplifier inside the sensor, enabling the...
This simple circuit was found in Popular Electronics from 1992. The transistor is a...
In the figure we have the way to implement an adjustable active cycle oscillator using PLL 567....