We found this circuit in a 1968 Electronics World. The circuit uses a transistor of the time providing a 16 dB signal gain with a 4 V output.
This circuit functions as a thermostat triggering a relay when the boil control temperature...
The sensor of this circuit is an NTC and the indication is made on a common analog indicator, and...
This circuit is from a 2005 Linear Technology application manual. The circuit has an on-off...