Abstract: In life, street lamp lighting is indispensable, it can make our way more
bright, to make our city more beautiful. This paper designed a kind of 51 single-chip
microcomputer as the core controller based on the numerical control voltage control
system. This circuit has voltage can be stepping modulation, output voltage and
current signal to adjust and display light situation, according to the switch function
leds. This design voltage control system mainly lamps STC89C52 singlechip control
unit, first with the light signal acquisition circuit relay drivers, again with analog-to-
digital conversion chip DAC0832 output, and controls the three reference voltage
stabilizer LM317 output voltage, the output voltage/current simultaneously on
sampling, then adopts A/D conversion chips for sampling ADC0832 voltage, current
into digital signals, then through the SCM realizing closed-loop control. Along with
the development of science and technology, especially the rapid development of
computer technology, people power saving consciousness rise ceaselessly, the control
of the power supply voltage will become urban construction of choice.
Keywords: Micro Controller Unit (MCU);digital-to-analog converters (DAC);
digital converter (ADC);closed-loop control