This circuit was found in an Electronic Design from the 90s. The circuit uses a type J thermocouple that can measure from -50 to + 100º C. Power is provided by a 3 V lithium battery.
We found this circuit in a 2005 Linear Technology manual. The circuit can operate directly on 3 V to 36 V...
This circuit from a Radio Electronics from December 1974 was used in color televisions of the...
This simple lie detector was found in Popular Electronics. Transistors are commonly used. The...