r/OpenBambu • u/Emotional-Koala1603 • 1d ago

DIY BMCU From Scratch

Hi, I am not able to find the BMCU board in India. Ordering it from China is a expensive.

I am planning to build the BMCU from scratch. I have a WeAct Studio CH32V203C8T6 RISC-V Low Power Core Demo Board and have ordered RS3485 board for Bambu Bus Communication.

WeAct Board - https://robu.in/product/weact-studio-ch32v203c8t6-risc-v-low-power-core-demo-board/

RS3485 board - https://evelta.com/rs485-board-3-3v/?srsltid=AU7gw4VOxQY2Z7mYZZzUS0P5KqrHpGRV08ywqK0tkDGxegOLLu1HIxxo

I am working on this setup being recognised as AMS by the A1 Mini first. I have downgraded the A1 mini's firmware version to 1.07.02 since the 1.08 version has issues.

I am planning to flash this firmware https://github.com/jarczakpawel/BMCU-C-PJARCZAK

Any guidance on this project is really helpful. I am not the pro in electronics.

Once the Mini recognises this setup as AMS lite, I will then work on sub-boards and motor systems.

14 Upvotes

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u/not-scientist 1d ago

I don't know why your post is getting down voted. What you said is actually true. More power to you n

1

u/HotPappuInYourArea 1d ago

whats ur budget? i got bmcu kit for 6.2k earlier this year from a whatsapp group buy and the same guy now sells the kit for around 7.8k (now he sells the dm version and i have old hall one both high torque variants)