Circuit designed around the ever-popular LM741 op-amp, designed to control any device where temperature set points are required. The relay is rated at 5A at 220V.
Our own ''test'' sample had an adjustable range of 0°C - 100°C. Finer adjustment may be achieved by replacing the on-board preset potentiometer with a multi-turn version.
Supply voltage = 9v - 12v
Tags: Temperature, soldering, KIT