We found this circuit in a 1980s documentation. Equivalent components can be used. The circuit senses temperatures in the range of 0 to 50º C and uses a transistor as sensor.
This Hughes circuit is from 1968. Equivalent modern components can be used. The input impedance is...
In the figure we have the way to obtain a voltage indicator for a 3-terminal voltage regulator. The...
In this application we show how to get tuning from 0 V to an LM350 regulator IC. The setting also...