Bonsai C4 Microcontroller Board
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Bonsai C4 Microcontroller Board

$19.95
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Imagine a ProMicro with faster keyboard matrix scanning, plenty of memory for controlling color displays, and up to 32 keymap layers in VIA/Vial. Introducing Bonsai C4, a high performance drop-in replacement for the ProMicro. Bonsai C4 is an open source STM32F411CEU6 microcontroller board with: USB-C ARM-based microcontroller 96MHz (when using USB) 512kB program flash memory 128kB RAM 8kB of FRAM on-board (for storing configuration settings) 16MB of flash storage on-board Reset circuit on-board STM32F411 includes a built-in USB bootloader, so all you need to start flashing firmware onto it is a USB-C cable. If you are using Bonsai C4 for split keyboards, we've included solder bridges to easily modify the soft serial pin assignments as needed. The circuitry for both the extended and compact editions are identical, however the compact edition places the FRAM and flash chips on the back side of the PCB and is the same length as a ProMicro. The extended edition has all the components

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