The device is built around the diminutive Arduino-compatible ... his buttons and rotary encoder on the PICO’s digital pins. To that end, he [Jeremy] used the fantastic I2C rotary encoder ...

Adafruit has made an I2C interface for four rotary encoders. It comes in the form of a PCB with four ... at any time over I 2 C,” according to the company. “You can use our Arduino library to control ...

At the heart of the device is a AD9833 waveform generator; with the Arduino, rotary encoder, and 16×2 LCD providing an interface to control it over SPI. Unfortunately, the AD9833 doesn’t have ...