Originally suitable for photography applications, this circuit from a Popular Electronics from the 90s can also be used to time plate baths. The components are common, and the sensor is remote.
This circuit is from an April 2000 Poptronics. The magazine no longer exists, but the circuit can...
This circuit, with output of 1.5 A, was found in a magazine 73 of the 90s. The integrated circuit is from...
This circuit, well known, since it is already present in other points of this website, is from an...