Other settings like this can be found on this website. This makes use of old operational amplifiers, as the publication where we obtained, but equivalents can be used.
Found in a 1980s American documentation, this circuit has a current consumption of only 1 mA. The...
Found in na 1970 EDN this circuit has a parallel regulation providing a symmetrical output of 15 V....
This circuit triggers a relay when the set temperature is reached. The circuit is from an old...