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.
We found this circuit in a Popular Electronics of the 90s. Its purpose is to detect when it locks...
In the circuit shown in the figure, we add a capacitor (C2) and a resistor (R4) at the base of the...
This circuit, from a 1975 technical documentation provides a gain of 14 dB at signals from 500 kHz to...