This circuit was found in a 1980s documentation. The circuit uses common components having an output of 10 Hz per centigrade degree of variation. The sensor is a transistor.
This configuration shows the simple way to use a varicap diode to tune an LC circuit. Capacitor C1 must be...
This circuit consists of a touch switch with optical isolation, using CMOS integrated circuits. The...
Within a range of values, this circuit converts input voltages into corresponding currents. The...