Temperature and Humidity Controller Based on P89LPC920FDH

Dong He Xi; Juan Du

doi:10.4028/www.scientific.net/AMM.539.577

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 539Temperature and Humidity Controller Based on...

Temperature and Humidity Controller Based on P89LPC920FDH

Abstract:

This paper describes the design of a temperature and humidity controller, the controller takes P89LPC920FDH SCM as the core. P89LPC920FDH micro-controller integrated with internal comparator, watchdog timer, and reset circuit modules. The main control circuit board uses comparator to detect alternating current zero crossing point, uses the timer after a time delay to thyristor trigger pulse to control the hair AC conduction angle, thereby heating power control circuit to control the temperature and humidity of the environment, the purpose of.