Master Board Electronics Replacement Parts

Hi there,

I have been in contact with Beta Board about manufacturing/purchasing a master board for the Solo 12 using the schematics/reference quote you provided. Unfortunately, the following parts are out of stock on Digikey/Mouser (at least in the EU/UK)/ they need clarification for:

· C10,11,12: the order number is for components in 0402. But as per BOM it should be 0805.

· IC2: is not available from Digi-Key. Please give us an alternative. (https://www.digikey.co.uk/product-detail/en/maxim-integrated/MAX17502EATB-T/MAX17502EATB-TCT-ND/5820948)

· L1: is not available from Mouser. Please give us an alternative. (https://www.mouser.co.uk/ProductDetail/Coilcraft/LPS6235-153MRB?qs=QQJxVsr8EGYwSUq1FFMxOw%3D%3D)

· U$4: is not available from Digi-Key. Please give us an alternative. (https://www.digikey.co.uk/product-detail/en/hirose-electric-co-ltd/DF13-6P-1.25DSA/H2195-ND/241769)

I think this may be a viable alternative for the Hi-rose connector: https://www.digikey.co.uk/product-detail/en/hirose-electric-co-ltd/DF13-6P-1.25DSA-75/H126408-ND/9170643

For the IC2, perhaps this:
https://www.mouser.co.uk/ProductDetail/Maxim-Integrated/MAX17502EATB%2BT?qs=Vwh6e7toGLgE6OAAxPIXhg%3D%3D

And finally for the L1:
https://uk.farnell.com/coilcraft/lps6235-153mrc/inductor-15uh-20-1-22a-shld-smd/dp/2408289?st=lps6235-153mrb

Do you think these parts will work? For the L1 it looks like the only difference is one is “Machine Ready”. I don’t know exactly what this means, but I presume it means it can be put into an automated machine such that it chooses things (i.e. it comes with some extra packaging). I suspect that this isn’t relevant if I’m still buying these one-off’s from Farnell, but I’m not super familiar with this.

Hello @shahp,

I checked the parts you identified and they seems ok to me.

About C10 C11 C12, It should be a 0805-22UF-6.3V capacitor. I’m not sure where the 0402 popped up. Do you know which BOM they are referring to?
The BOM here seems ok: https://github.com/open-dynamic-robot-initiative/master-board/blob/0cd12dd35599d226c271f832f5fded180ad6045c/hardware/V2/esp32_master_board.csv#L12

Additionally I’ve made a BOM specifically for Seeed Studio here:

https://github.com/open-dynamic-robot-initiative/master-board/blob/master/hardware/V2/production_files/seeed_BOM.csv

The octopart links in the last column are super useful to view all suppliers stocks and alternative parts.
For example, for the 0805 caps: GRM21BR60J226ME39L Murata | Distributors, Price Comparison, and Datasheets | Octopart