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.
The sensor diode used in this circuit is the common type of germanium. Experiments may be made...
This small transmitter that we found in a 1988 documentation, has a range that depends on the...
This power supply has a resolution of 10 pA in the current range from -100 to +100 nA. The circuit is...