This circuit was found in a 1969 Mullard documentation. Used transistors can be replaced with modern equivalents. Output transistors may be BD135 and 136 with heatsinks.
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...