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Building Your Own VESC


#1

Has anyone here built their vesc from scratch? How much did it cost you? What were the savings versus buying one from someone like @onloop? Would you say it’s worth the savings? I know you can get 3 pcb’s made from OSH Park for like $20. I can adequately solder through hole components, but it’s pretty daunting even thinking about smd soldering and flashing the firmware and bootloader.


#2

On my list to try.

I took Ben’s BOM and priced it out. Buying just single components from Mouser is where it gets expensive. I think you are better off buys in 10’s for hte inexpensive parts, then singles of the more expensive components (like the DRV).

Single price for the components was around $65 iirc. I kept the modified sheet - i’ll pull it up and confirm.
EDIT - i was WAY off - single VESC pricing for mouser parts to build was 86.63 before shipping. building 10 to compare the price breaks was 58.73 ea (almost 600 invested). Now imagine doing a run of 100!

So besides the ability to repair and build an extra when needed, it’s definitely not cheaper than a single VESC for 100-120’ish (getting the solder paste, no-clean flux, shipping, etc.)

Still think i’m going ot give it a shot sometime soon!

As for SMD soldering - Jamesonotc helped me swap the DRV chip on one of mine that i killed (on the bench on 12s - does not like hard stop/start repeatedly - just FYI don’t do it). After watching him i think i can totally do it. Do you have a hot air rework on your solder iron / station?

I’ll dig up my modified BOM and get some more detail.


#3

here’s a snipped of how i priced this out:


#4

I’ve built 2 VESC for about 110$ each. 3hrs of soldering each. I bought 2 others from from enertion boards because i couldn’t be bothered with another 6hours of soldering.

The price break sweet spot is about 10 units, where you can get you BOM down to about 75$ per unit.

The pcbs OSH park is about 40$ for 3 since this is a 4 layer board.


#5

Wow, not cheap. I supposed it wouldn’t be worth it then unless it’s done for fun. I actually do have a hot air rework on my soldering station, but I’ve never used it for anything more than shrinking heat shrink.


#6

This is the one I found already uploaded to OSH Park. It’s $19.50 for 3 pcb’s.

https://oshpark.com/shared_projects/cIUJ8Qor


#7

Oh and when ordering from osh park, make sure you’re ordering 4 layers… The side by side pic, thats me transfering all the components from a useless 2 layer pcb to a good 4 layer pcb.

I felt pretty dumb when i realised that mistake


#8

Mr wisconsinrobotics is sharing garbage, it’s a 2 layer board…

Well i least i’m not the only one who did that mistake haha


#9

we call that “practice”! hehehe

that sucks!

I’m ordering up some of the CapPCB’s from hackvana to see how that process works. Definitely a lot less expensive than OSH Park - but also about 3 weeks before they arrive. I could spend another $30 for faster shipping and have it in 2 weeks, but i’m in no rush actually.

Mitch at hackvana was really easy and communicative, so i’d recommend them if you are looking for less expense and willing to take a little while longer.