AbstractSCM is the modern computer and electronic technology in emerging areas. The single-chip microcontroller small size and low cost, can be embedded in wider such as toys, household appliances, robotics, instrumentation, automotive, industrial control units, office automation equipment, electronic financial systems, ships , Personal information terminals and communications products. It will become the most important intelligent tool for a modern electronic system. SCM is multi-functional, high-performance, low-voltage, low power consumption, low price of the notable features. Therefore, the use of water tanks for SCM constant temperature control can greatly reduce the input of high economic value and practicality. Moreover, use of the water tank temperature control and real-time detection figures show in the MCU, can improve labor productivity and product quality, energy conservation and so has a positive meaning. On the market today it have some SCM constant temperature control system successfully developed, such as water heater thermostat SCM, SCM resistance furnace temperature control.
The system which is first temperature sensor on the DS1820 temperature sampling and conversion, will be given to the measurement results Tx SCM; SCM will enter the value and the internal temperature specified unit of a given temperature T comparison, that is according to the results by an executive body - SCR on the heater breaking state control in order to achieve the effect of water temperature control. System can be wide range of heating as a source of constant temperature control of the occasion, such as resistance heaters, electric kettles, light bulbs, that is simple and reliable, economical and practical features.
Keywords: SCM, temperature sensors, with zero trigger, two-way SCR, heater
