Electronic Power Rheostat 2018-07-23

Introduction --
Generating an adjustable resistance that can carry a higher current and dissipate more power than standard potentiometers is occasionally required for testing or other purposes.
An electronic circuit is desirable for this purpose to avoid the high cost and limited resistance range of power rheostats. Circuits that can provide a constant adjustable current load are common, but not so much for constant adjustable resistance.
Discussed here is a circuit using an...

Click to expand...