Temperature Controller Circuit. The ratio arms r1 and r2 of the bridge are kept fixed say unity. Temperature controller circuit schematic.
The voltage across the thermistor i e. A precision temperature controller uses a current or voltage source to drive power through these actuators based on feedback from a temperature sensor. The advantage is that a well regulated power supply is not needed.
It is based on the principle of wheatstone bridge.
You can build a temperature controller circuit with the 555 ic together with a thermistor resistor divider. A digital temperature controller circuit is a precise temperature controller in medical industrial and home applications. It is based on the principle of wheatstone bridge. The controller has been designed and fabricated using the op amp ic 741 and a 1k thermistor as the temperature sensor.
