Ryan Ma's PD Micro Offers USB Power Delivery to 20V in an Arduino Pro Micro-Compatible Board

The PD Micro offers 5-20V of USB Power Delivery plus all the usual features of an Arduino Pro Micro including full breadboard compatibility.

Gareth Halfacree
3 months ago β€’ Hardware 101
The PD Micro brings USB Power Delivery to Arduino projects. (πŸ“·: Ryan Ma)

Ryan Ma is preparing a crowdfunding campaign for PD Micro β€” an Arduino-compatible, Pro Micro-style breadboard-friendly development board featuring USB Type-C Power Delivery capabilities.

"PD Micro is the first Arduino-compatible board with USB-C power delivery. The pins are compatible to Pro Micro," Ma explains of the design, which is built around the Microchip ATmega32U4 microcontroller operating at 5V and 16MHz and a TPS62175 DC-to-DC converter plus FUSB302 USB PHY. PD Micro allows you to control high voltage easily from USB-C Power delivery. It’s useful for applications that require voltage higher than 5V β€” like motor control or a high-power LED."

"PD Micro is accompanied by our newly-implemented, simple, compact, USB-C power delivery library. This was written over the course of porting the code for PD Micro. We ended up writing a library completely from scratch. The result is a simple, compact, portable source code for USB-C device only application, which can be put inside ATmega328/ATmega32U4."

The PD Micro includes an Arduino Pro Micro-compatible pinout, plus screw terminals for the USB Power Delivery portion: Configurable using the bundled library, these terminals offer 5-20V output from a 5V USB Power Delivery-compatible power supply connected to the board's USB Type-C connector.

As a Pro Micro-compatible development board, the PD Micro also includes nine 10-bit analog-to-digital conversion (ADC) pins, 12 digital IOs, five ground pins, three VBUS pins connected to the USB Type-C power input plus one regulated 5V output from the TPS62175. Status LEDs are also provided for serial TX/RX plus five for feedback on the voltage and three for the current of the USB Power Delivery function.

Interested parties can sign up on the PD Micro campaign page to be alerted when it goes live.

Gareth Halfacree
Freelance journalist, technical author, hacker, tinkerer, erstwhile sysadmin. For hire: freelance@halfacree.co.uk.
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