Hey guys,
Long-time listener, first-time poster. I’ve been on this forum for quite a bit now quietly watching and learning, and I feel I should try to pay it back. I have put together a little video that goes over all the basics that one would need to know in order to get started on designing and then building their own project. I have been in love with electric skateboards for a while now and think they will be a big part of future transportation, having said that, it can be a little daunting for someone just starting off. I tried to make this as easy as I could and include as much as I could. Of course, there’s still tons more information out there, but I figure this could be a good place to start. If at any point you see something that you don’t like, please leave a comment and I’ll make sure I update it somewhere. Here is the video, good luck!
My dog is currently watching this rn but I’ll def check it out in 10hrs when its over Wild Deer and Turkeys in the Forest - 10 hours - March 8, 2021 - YouTube
I stole the remote while the bitch was poopin in the yard… pretty decent video, can tell you put a bit of work into it. Nice job.
that’s hilarious, your dog has good taste, thanks man.
I am about to take a look. But for now. Link you have to the video is time stamped, so it doesn’t start from the beginning.
You might want to edit that link in a first post.
Motor amps are not the same as battery amps.
If your motors pull 95A each. You won’t be pulling 190a from the battery.
As you can see in this log, motors were at 112A but the current draw at the battery side was only 58A
Thanks for letting me know, ill fix it. As for the amperage. I believe the reason you have a low battery current is that you probably have low motor voltage or in the case of the vesc, low duty cycle, which seems like 61% in your case. However, if your vesc were to apply a higher duty cycle you would probably hit a higher battery current. I don’t think you would necessarily high 190 amps, but you would still draw a fair amount.
6500 rpm/140kv = 46.42v Cemf
Assume 50.4v battery voltage at 95% duty cycle
50.4 x .95 = 47.88v
47.88v pwm - 46.43v Cemf = 3.97v
3.97v / 0.05ohms = 79.4 amps
79.4a x 47.88v = 3801 watts
3801 w / 50.4v = 75a battery amps
Hopefully I got some of this right , wasn’t the direction I was planning on with the video, mostly just to play it safe I guess. But non the less if you’re going really fast with lots of resistance you could get pretty close to 95 battery amps 
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Seems like you do indeed know your stuff. I haven’t watched all of your video yet, when I have some time I’ll give it a go.
There is definitely a place for a video like this, and the idea has come across my mind to do it on my YT channel as well.
Thing about electric skateboards is that there is so much personal opinion on how they ride that there is no one-size-fits-all. So in that sense, the title is a little bit click-bait, especially since there is never any building in the video
Anyways, I’ll add some more comments later probably when I get around to watching it. Personally, I find slideshow type of videos a bit hard to watch - don’t take it too personally, trying to give you some constructive stuff here
You seem to have a lot of good information though, good start.
I definitely agree with you on the PowerPoint, in coming videos I’ll definitely get more animated and engaging. You’re so right about it not being one size fits all, I tried to make it as open as possible so you could go through the steps to get the result you want but it will always be tough without going through trial and error. And there was so many things I didn’t get a chance to include. Thanks for your input! Cheers!
I agree with that sentiment. Maybe switch up the plain white background here n there and maybe not as much plain small text. Something like a whiteboard, digital or otherwise, would be cool and helpful at certain points.
I’d still let ya do my math homework though.
But you only have two hours of read time.
On the surface, this sounds like a Youtube account promotion and SEO post more than anything else.
It’s definitely super sus.
“CoMe LiKe AnD sUbScRiBe, SmAsH tHaT nOtIfIcAtIoN bElL” stuff
I hope to be proven wrong
Fortunately you have access to the forum without having the need for an account!
. To be honest if it was for views I wouldn’t choose such a niche (for now!)product, the 5-10 views I would get from here probably wouldn’t make much of difference:stuck_out_tongue_closed_eyes:. I plan on sharing my recent build(the one in the video) directly on the forum, keep an eye out for that! Thanks for your comment!
I think a great project would be a 2nd version of this video using our feedback. There’s definitely a need for more videos like these.
Are you open to this idea? We can all write the script together in this thread 
IDC who actually does this but now I really wanna see that happen. This community could definitely use some more exposure for the limits we’re pushing and developments people are making. Plus it’d be great to get more people into esk8.
I think it’s a pretty cool idea, I don’t think I’d be up to do another one so soon since there’s a few other projects I’d like to get to first. Down the road though, I’m super down! See how things play out.