Abstract: | The system measuring and controlling a lower temperature is developed with a computer on slice 8031. AD590 changes the temperature signal into the electric one and 0804 turns the electric signal into the figure one, then it is inputted to the computer on sloe to be handled. Finally, it is outputted to show the temperature measured and control the electric heater. If the temperature to be measured and controlled is more than the ambient temperature and less than 100, it can be freely set up. Without the temperature set up , the wystem will give a warn. |