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Inflatable Air Blower digital temperature sensor module design

Date: 2015-4-24   Click: 1538 Times

"Inflatable Air Blower" temperature sensor can be selected LM324A operational amplifier, which is designed to proportionally control regulator, the output voltage is proportional to the resistance of the thermistor, but this solution requires multiple samples can accurately detect the rear, too cumbersome. So I used the more excellent DS18B20 digital temperature sensor, "Inflatable Air Blower" analog temperature signal can be directly converted into a digital signal, reducing the complexity of the circuit, improving the operational quality of the circuit. Motor speed control system of the whole is an important aspect. By controlling the triac conduction angle, so that the output voltage is changed, so that the applied "Inflatable Air Blower" input voltage is changed to adjust the fan speed to achieve variable speed wind each gear.

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