This circuit was found in an American documentation from the 1980s. The sensitivity ranges from 100 mV to 1 V. The supply must be done with an excellent filtering source.
The relay of this circuit closes when the position set in P2 is reached by the sensor...
This circuit is intended to monitor the flame of gas heating systems that must always have a small...
This circuit makes use of an old operational one to generate clock signals that depend on the...