This circuit triggers a relay when the set temperature is reached. The circuit is from an old documentation. The relay may be equivalent according to the transformer secondary voltage.
This audio signal relay was found in an American 1980s documentation. The relay is in accordance...
This circuit is from an old publication of the 70's. It can be implemented with modern transistors like the...
This Maxim Voltage Supervisory integrated circuit can be obtained from Mouser Electronics. It has...