This circuit is from an American 1964 documentation. Transistors of the time are used, but modern equivalents can be employed.
This logic circuit can indicate both TTL (5 V) and CMOS (5 to 12 V) output levels, operating with...
The sensor of this circuit is an NTC with a resistance between 200 and 1000 ohms. The resistor R1 must...
This circuit was found in a 1980s documentation. The operational amplifier is of a common type at the...