Adafruit High Voltage UPDI Friend - USB Serial UPDI Programmer

The Unusually Playful Device Interfacer is compact yet powerful, simplifying the programming of modern ATtiny chips. It features selectable 3V or 5V power, indicator LEDs, and a versatile quick cable for easy breadboard integration.

This HV version enables sending a 12V pulse for programming, essential for UPDI pin configurations as reset or GPIO. Unbrick chips configured for HV usage effortlessly and reset fuses for Low Voltage programming.

Easily program with a CP2102-based breakout using this friendly device. Equipped with a CH340E USB Serial converter, internal 12V boost converter, and 1K loop-back resistor, it supports cross-platform drivers and uses a USB Type C connection.

Specifications include a JST SH cable for breadboard connections, 0.1" spaced breakout holes, green power OK LED, and red serial activity LED. Inspired by Stefan Wagner's open-source hardware design, this interfacer is compatible with the Arduino IDE using megaTinyCore board support.