Bonsai C3 Microcontroller BoardBonsai C3 is a high performance drop in replacement for the ProMicro. It is functionally equivalent to the Proton C. Bonsai C3 is an open source STM32F303CCT6 microcontroller board with: USB C ARM based microcontroller 72MHz 256kB program flash memory 48kB RAM Reset circuit on board Audio speaker on board STM32F303 includes a built in USB bootloader, so all you need to start flashing firmware onto it is a USB C cable. Because Bonsai C3 is an open

if one encoder is selected for purchase

For the gaming pad portion only

QMK/VIA support

RGB underglow

and stabilizers)

or if you need to communicate a custom Pantone-matched color value

Underglow RGB LED lighting

If you purchase this option

Note: Only add the "Additional Quantities" item if you are also ordering the "Fully Custom Mechanical Keyboard Design Service" and would like additional kits

Why Choose Bonsai C3 over a ProMicro

Bandaid Modded Stabilizer Install (18 minutes)

Imagine a ProMicro with faster keyboard matrix scanning