Product description
Adafruit DS1841 is a digital potentiometer with an I2C interface that makes it possible to control resistance electronically via a microcontroller instead of using a manual knob. Unlike linear models, the DS1841 uses a logarithmic resistance curve, making it especially suitable for audio applications such as volume control where adjustment better follows how human hearing perceives changes. The board offers 128 adjustable steps and can also temperature compensate the resistance via an internal LUT table. Communication takes place via I2C, and the board is equipped with dual Qwiic connectors for quick solderless connection. It works with both 3.3V and 5V systems and is compatible with platforms such as Arduino, Raspberry Pi, and ESP32.
Specifications:
- Sensor chip: Maxim DS1841
- Type: Digital potentiometer
- Resistance range: 3.7 kΩ to 22 kΩ
- Fixed resistance: 3.6 kΩ
- Resolution: 7-bit
- Adjustment levels: 128 steps
- Curve type: Logarithmic
- Communication: I2C
- Temperature compensation: Yes, internal LUT
- Supply voltage: 2.7V to 5.5V
- Logic level: 3.3V and 5V compatible
- Connection: 2x Qwiic
- Platform support: Arduino, Raspberry Pi, ESP32, CircuitPython, Python
- Dimensions: 25.5 x 17.6 x 4.6 mm
