The use of 51 microcontroller and two separate buttons to control the digital potentiometer X9C103 resistor output, step-bit 100Ω.

键控X9C103\main.c
..........\main.LST
..........\main.OBJ
..........\qq
..........\qq.hex
..........\qq.lnp
..........\qq.M51
..........\qq.plg
..........\qq.uv2
键控X9C103

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