Valve control temperature adjusting circuit

Published:2011/4/18 0:30:00 Author:Nicole | Keyword: Valve control, temperature adjusting | From:SeekIC

This temperature control circuit can control 220V servo motor to turn left or right, its static range can be adjusted. The bae of push pull stage is controlled by feedback amplifier TAA861, switches T3 and T4 each controls its relay to make the motor turn left or right. The temperature testing adopts R1~R6 bridge circuit, the sensor is K274 thermal resistor, using potentiometer R1 to pre-select the given temperature. The main technical data: the work voltage: 18V; the temperature range: 25~95℃; the highest temperature of sensor: 100℃; the temperature difference within ±10% power voltage wave motion: < 0.1°K; the adjustable static region: 0.2~1°K.



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