X9C103S Digital Potentiometer Module 10K

The X9C103S is a digitally controlled potentiometer that lets a microcontroller adjust resistance electronically instead of relying on manual rotation, making precise, repeatable calibration possible in embedded projects. With a total end-to-end resistance of 10KΩ spread across 100 selectable wiper tap positions, this module suits applications like audio volume control, sensor calibration, offset adjustment, or any circuit where an ADC and control loop need to fine-tune resistance automatically.

Control is handled through a simple 3-wire digital interface using CS (Chip Select), INC (Increment), and U/D (Up/Down) pins, letting a microcontroller step the wiper up or down one tap at a time without needing a complex communication protocol. One of the module’s standout features is its non-volatile memory, which stores the last wiper position even after power is removed, so your calibration setting is retained the next time the circuit powers on.

Compatible with Arduino, ESP32, ESP8266, STM32, and most other microcontroller platforms, the X9C103S operates comfortably on a 3V to 5V supply, making it easy to integrate into both 3.3V and 5V logic systems. This makes it a practical building block for hobbyists and engineers working on projects that need programmable resistance without the bulk or imprecision of a mechanical trimmer.

Specification:

• IC Chipset : X9C103S
• Total Resistance : 10KΩ
• Wiper Tap Positions : 100
• Step Resolution : ~101Ω per Step
• Wiper Resistance : ~40Ω (Typical)
• Operating Voltage : 3V – 5V DC
• Control Interface : INC / U-D / CS (3-Wire Digital)
• Memory Type : Non-Volatile (Retains Last Position)
• Max Wiper Current : 4.4mA (Sink/Source)