Using ADC0809 and 51 chip digital voltmeter, on the basis of proteus simulation, to implement the AD conversion within 0 to 5 V digital tube display, the error is less than 0.002 V.

48468.LST
48468.OBJ
48468.c
AD转换（带定时器）
AD转换（带定时器）.M51
AD转换（带定时器）.hex
AD转换（带定时器）.lnp
AD转换（带定时器）.plg
AD转换（带定时器）.uvopt
AD转换（带定时器）.uvproj
AD转换（带定时器）_uvopt.bak
AD转换（带定时器）_uvproj.bak
数字电压表(定时) .DSN

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