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 circuit is from the 1990 Motorola Linear Databook, which can be developed with more modern...
This oscillator for the fifth overtone of a crystal was found in a Radio Electronics magazine from...
This oscillator uses a general-purpose transistor that can have BC548, BF494 or 2N2222 equivalents and...