Circular Soft Potentiometer (Ribbon Sensor)

Circular resistive ribbon sensor with a donut-shaped sensing region (55.96 mm OD, 35.63 mm ID) and nominal 10 kΩ across the outer leads. The center wiper floats when unpressed — use a ~100 kΩ pull-up.

Outer lead A
One outer lead of the nominal 10K soft potentiometer. Adafruit says one side pin is connected to ground through a 10K series resistor for use.
Type · passiveVoltage · Use through 10K series resistor; do not connect directly to ground/power per Adafruit product page.
Wiper / middle pin
Middle pin resistance changes relative to either outer lead depending on press position; read as the analogue output. Adafruit says it floats with no pressure.
Type · analogVoltage · Analogue voltage ranges from about 1/3 Vcc to 2/3 Vcc in Adafruit suggested circuit.
Outer lead B
Other outer lead of the nominal 10K soft potentiometer. Adafruit says the other side pin is connected to Vcc through a 10K series resistor for use.
Type · powerVoltage · Vcc may be 3V, 5V etc through 10K series resistor per Adafruit product page.

Pin	Position	Type	Function	Voltage

Start wiring

I2C · Analog · 3.3 – 5 V · Bare

Verify supply voltage and logic levels before powering up.

Module pins: Outer lead B, Wiper / middle pin. Schematik maps them to your board in the app.

Encoders

26 other options

Bare EC11 quadrature encoders, I2C navigation encoders, absolute AS5600 and 8421 encoders, slide and ribbon potentiometers, and digital I2C pots — covering most ways to read angular or linear position.

View all 26

Adafruit ANO Rotary Navigation Encoder to I2C STEMMA QT Adapter visual preview

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