This circuit, which controls both the temperature and the level of a liquid in a reservoir, was found in an Electronic Design from the 90s. The circuit is based on a double 555.
This circuit was found in a May 1981 Radio Electronics magazine article. The circuit is offset...
This circuit was obtained from an American documentation from 1968. The current depends on the...
Indicated in Maxim's documentation from the 90's, this circuit has a gain of 40 dB and an output...