Closed Loop Control Circuit using Sensor and Actuator

Closed Loop Control Circuit using Sensor and Actuator -The herein article contains information related on the method of closed loop control with a sen

Closed Loop Control Circuit using Sensor and Actuator -The herein article contains information related on the method of closed loop control with a sensor and an actuator and thermistor sensing circuit diagramhow to apply the method to build a rudimentary On/Off heater controller (On/Off Temperature

Control).

The semiconductor components used to build this control circuit are thermistor, Zener diode, LED, relay, op-amp, and bipolar transistor.

Sections describe in this article are such :

essential elements of the control circuit,
basic thermistor sensing circuit (using an op-amp without feedback as a comparator),
thermistor sensing circuit using 2N222 transistor with 4 and output driver stage added,
controlling a real actuator with a relay, and then finalising the circuit and improving the stability with Schmitt Trigger.

Complete read on Closed Loop Control Circuit using Sensor and Actuator can be download in pdf here (source: math.temple.edu)

Tags: temperature control, actuator, control circuit, thermistor, 2n2222 datasheet, Sensor,