This sensitive touch key appears on this website from other sources. This version was taken from a 90s American documentation. The source must not be of transformerless type.
This circuit uses a common diode as sensor. The output goes from 0 to 10 V with the temperature change in...
The circuit presented was suggested by the National Semiconductor's Linear Applications Handbook of...
This circuit was found in a 1966’s NASA documentation. The circuit shows how to use thermistors...