This 80's circuit uses an audio amplifier to obtain a symmetrical source from a single source. The maximum current is on the order of 1.3 A and the input voltage must not exceed 20 V.
We found this circuit in a 1976 technical documentation, but it can be assembled with modern...
The general-purpose thermostat shown in the figure uses a high-resistive thermistor as a sensor....
This circuit is characterized by its low input impedance and voltage gain below the unit. The...