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 purpose of this circuit is to excite a TTL input with lz pulses. The phototransistor can be of...
The photocontrol that we give in this project of a 1982 documentation allows to activate a circuit...
This circuit, found in a 1997 publication, activates a lamp or a monitoring camera when the bell...