NyoomiesKME

A Pico or BlackPill powered expansion board for Klipper, with support for four motors running in SPI or UART, and ability to run higher currents than most mainboards.

Supports sensorless homing or standard endstops, and sensorless homing when using BigTreeTech EZDriver adapters
Designed with TMC-based Stepsticks in mind, featuring full support for a mix of SPI and UART drivers on one board along with the ability to install either JST-XH or MF3 connectors for your motors
This board features native support for the STM32F4x1 BlackPill, with the unused extra GPIO being broken out to an expansion header.

If you need further support or want to see more information and announcements, join the discord, or support me and future development on Ko-Fi.

Vendors

UK / EU

Contact me on Discord if you want to add yourself to this list!

Bill Of Materials

Component	No. Needed	Cost (Total)	Comment	Sourcing URL
5.08mm Screw Terminal	1	£0.68	Power Input	https://www.lcsc.com/product-detail/Screw-span-style-background-color-ff0-terminal-span_MAX-MX129-5-08-02P-GN01-Cu-Y-A_C5188485.html
Automotive Mini-Blade Fuse Holder	1	£0.34	Takes ATO Fuses	https://www.lcsc.com/product-detail/Fuse-Holders_XFCN-XF-506P_C492610.html
63v 470uF Capacitor	4	£1.95	Can substitue with up to 17mmø diameter cap w/ up to 7.5mm pitch	https://www.lcsc.com/product-detail/Aluminum-Electrolytic-Capacitors-Leaded_PANASONIC-ECA1JM471_C5362346.html
1x4 Molex MF3 Connector	4	£0.60	Motor Connectors, (Pick One)	https://www.lcsc.com/product-detail/Wire-To-Board-Connector_HCTL-HC-MX3-0-4A_C5441109.html
1x4 JST-XH Connector	4	£0.45	Motor Connectors, (Pick One)	https://www.lcsc.com/product-detail/Wire-To-Board-Connector_SHOU-HAN-2-54mm-4P-ZZ_C5368777.html
1x3 JST-XH Connector	4	£0.35	Endstop Connectors	https://www.lcsc.com/product-detail/Wire-To-Board-Connector_SHOU-HAN-2-54mm-3P-ZZ_C5368776.html
1x20 2.54 Socket	2-4	£0.57	MCU Socket	https://www.lcsc.com/product-detail/Female-Headers_JILN-22850120ANG1SYA01_C429947.html
1x8 2.54 Socket	8	£0.39	StepStick Socket	https://www.lcsc.com/product-detail/Female-Headers_Liansheng-FH-00882_C2685213.html
1x2 2.54 Socket	8	£0.52	Diag Pins Socket	https://www.lcsc.com/product-detail/Female-Headers_JILN-22850102ANG1SYA02_C429966.html
2x4 2.54 Header	1	£0.46	STM32 I/O (Optional)	https://www.lcsc.com/product-detail/Pin-Headers_Liansheng-PH-00179_C2829882.html
3x3 2.54 Header	8	£0.66	Driver Jumper Pins	https://www.lcsc.com/product-detail/Pin-Headers_HCTL-PZ254-3-03-Z-2-5-G0_C7429377.html
2x3 2.54 Header	8	£0.38	Driver Jumper Pins	https://www.lcsc.com/product-detail/Pin-Headers_HanElectricity-2541WV-2x03P_C5383104.html
24x 2.54 Jumper Cap	20	£0.38	Driver Jumper Pins	https://www.lcsc.com/product-detail/Shunts-Jumpers_Shenzhen-Kinghelm-Elec-KH-2-54TXM-H6-0-R_C5274534.html
1k Resistor (THT)	1	£0.01	UART TX
10k Resistor (THT)	4	£0.04	STEP Pin pulldown
Raspberry Pi Pico, or...	1	£2	MCU (Pick one)	https://www.aliexpress.com/item/1005003708090298.html
STM32F401 BlackPill	1	£2.3	MCU (Pick one)	https://www.aliexpress.com/item/1005006127461676.html

Total (Excluding PCB, Tax Shipping, Ect): ~£9.8 ($12.3 USD)

Driver Configuration Jumpers:

Gallery

LICENSE

This source describes Open Hardware and is licensed under the CERN-OHL-S v2 or any later version. You may redistribute and modify this source and make products using it under the terms of the CERN-OHL-S v2. (https://ohwr.org/cern_ohl_s_v2.txt)

This source is distributed WITHOUT ANY EXPRESS OR IMPLIED WARRANTY, INCLUDING OF MERCHANTABILITY, SATISFACTORY QUALITY AND FITNESS FOR A PARTICULAR PURPOSE. Please see the CERN-OHL-S v2 for applicable conditions.

Source location: https://github.com/comradef191/NyoomiesKME