This circuit was found in a 1966 General Electric documentation. It makes use of direct contact water sensors and therefore requires an isolation or low voltage relay drive transformer.
We found this circuit in a 1997 documentation. Its purpose is to fan an inverter for fluorescent lamp...
The figure shows how to implement a conventional current monitor with differential amplifier on an H...
This is a circuit using the DM31O0UI digital module. We found it in an article in the Radio...