This circuit, calibrated to the degree Celsius scale, was found in a National Semiconductor documentation from the 1980s. The circuit makes use of components of the time uncommon today.
This circuit was obtained in a Hands-On Electronics from the 90's. The circuit turns on one LED at...
This protective circuit for power lines was found in a Radio Electronics from November 1957. The...
We found this circuit in the Radio Electronics magazine of June 1978. This circuit through the...