Found in the March 1985 issue of Radio Electronics magazine, this circuit uses a digital module from the time that makes it easy to configure. The circuit uses a bridge thermistor as a sensor.
This non-inverting comparator was found in old American documentation. Formulas next to the...
This source, with slight variations, can be found in other articles in this section and on this...
The idea of this 1982 Experimenters Handbook circuit is to generate an RF signal in L2 that can be...