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Use Instructions:
wide voltage (3V-5V) power supply, PCB board size:2.7*1.3cm.
10K full range potentiometer.
the intermediate tap of the potentiometer is a total of 100 levels in the 0-10k. ( the typical impedance 40 ohm of the potentiometer slide ) .
digital potentiometer VL and VH port are respectively corresponding to the sliding rheostat low-end and high-end, allowing the input voltage range -5V to +5V.
digital potentiometer module with test procedures, the program code for the C language code, sub module. The code includes: the main function, the display sub function, the key sub function and the module of the header file, you can use KEIL4 to open the source code by the line testing and learning.