Keyboards & Input Devices
This project is launching soon.
Epi 32U4 is an Arduino-compatible, ATmega32U4-based microcontroller board with a pinout based on the Pro Micro. All pins are broken out to castellated holes with 1.27-mm spacing. We designed Epi 32U4 to accommodate noisy environments—even without voltage regulators—thanks to a ferrite power filter, a fuse, ESD protection, and surge protection. With an ATmega32U4 at its core, it can act as a USB device, which makes it perfect for keyboards and other space-constrained projects that require a compact controller.
|Epi 32U4||Pro micro||Elite-C V4||Qwiic Pro micro||µduino||Beetle||PICO|
|Footprint||22.75 x 12.75 mm||33 x 17.75 mm||33 x 17.75 mm||33 x 17.75 mm||12 x 12 mm||20 x 22 mm||15.25 x 15.25 mm|
|Protective features||Several ¹||None||None||None||Some ²||None||None|
¹ Varistors for ESD and surge protection, a ferrite-bead power filter, and a low-pass filter for analog voltage reference.
² A low-pass filter for analog voltage reference.
Made by Rasmus at Ping Hobbyelektronik using Paul Tol's muted, colorblind-safe palette CC-BY 4.0 2023
You can find source files for Epi 32U4 in our GitHub repository. Source files for the previous version are also available.
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"[T]his new dev board called the Epi 32U4 might be the smallest ATmega platform we’ve seen so far."
"This tiny board is Arduino-compatible and offers USB Type-C connectivity, making it an excellent choice for makers and hobbyists."
"The board has many features that make it an excellent choice for many projects, such as robotics, home automation, and IoT."
Kalmar, Sweden · rallekralle11 · ping-el.se
A nerd with too much free time...