Introduction

A CircuitPython driver for the AD5245 digital potentiometer.

The AD5245 Digital Potentiometer is an I2C, 10K-ohm chip. The potentiometer sports 256 resistance steps and can work with a power source from 2.7v to 5.5v. The pins act similarly to a passive resistive potentiometer, but require that voltages placed on any of the three pins not exceed the power supply voltage or drop below ground potential.

The Cedar Grove AD5245 custom breakout board provides power and signal connections for I2C and the potentiometer chip. The AD5245 is also integrated with the AD9833 ADSR Precision Waveform Generator FeatherWing.

Dependencies

This driver depends on:

• Adafruit CircuitPython

Please ensure all dependencies are available on the CircuitPython filesystem. This is easily achieved by downloading the Adafruit library and driver bundle or individual libraries can be installed using circup.

Installing to a Connected CircuitPython Device with Circup

Make sure that you have circup installed in your Python environment. Install it with the following command if necessary:

pip3 install circup

With circup installed and your CircuitPython device connected use the following command to install:

circup install cedargrove_ad5245

Or the following command to update an existing version:

circup update

Usage Example

import cedargrove_ad5245

ad5245 = cedargrove_ad5245.AD5245(address=0x2C)

ad5245.wiper = 255
print("Wiper set to %d"%ad5245.wiper)

ad5245_simpletest.py and other examples can be found in the examples folder.

Documentation

AD5245 CircuitPython Driver API Class Description

CedarGrove AD5245 Breakout OSH Park Project

For information on building library documentation, please check out this guide.

Contributing

Contributions are welcome! Please read our Code of Conduct before contributing to help this project stay welcoming.