source into electric signals to be transmitted to the d a conversion chip adc0809 after the d a conversion the digital signals are fed back into the scm 89s52 the signals transacted by the scm are transmitted in two ways concurrently the first way transmits the exported signals into d a conversion chip dac0832 the d a conversion chip dac0832 exports the signals into the light intensity regulation module in order to adjust the light intensity after converting the digital signals into analog control signals and the signals are magnified by operational amplifier lm324n in the example the stated optional light intensity regulation module that works with dac when using pmw the module will be replaced by an amplifier to supply the dc power directly on the line light is a voltage adjusting module ty 380d25p 2220 the transmission signals of the second method make the module light intensity and temperature value through display driver circuit jfc8279 bank select circuit 74ls138 and chip select circuit 74ls245 the current light intensity value and temperature value is displayed through the nixie tubes in the example the light intensity is fixed through pc and connected with scm through serial port communication chip max485 and.