Abstract
This system uses MPU machine as the control platform, adopting the A/D converter to sample environmental temperature, displaying the data processed through LED. So the man-machine interface is friendly. The error of the temperature controlled which can reach ±0.1℃ is high and the fluctuation of laser diode output is less than 1.5‰. This thesis analyses in detail the choice of the components and parts, the design of the circuit and the relevant software by giving the procedure flow charts of each module and actual circuit diagrams.
