Search found 546 matches

by Vanarian
Apr 10 2019 7:14am
Forum: Items for Sale - Used
Topic: [EU] FS: 2x VESC controllers + BMS + more
Replies: 1
Views: 315

Re: [EU] FS: 2x VESC controllers + BMS + more

Up, controllers sold! BMS is still available.
by Vanarian
Mar 05 2019 1:26pm
Forum: Stand-up E-scooters and E-skateboards
Topic: AT-One electric inline skates (quick update Feb 2019)
Replies: 211
Views: 32844

Re: AT-One electric inline skates (quick update April 2018)

Man I hope you'll be able to work again on it! Having a workable version already is big step in the good direction. How much did the clutch weight in steel btw? Me I'm taking it easy on mines for now, training analog (reached 30mph DH this weekend) to be able to control them when it's out. I'd like...
by Vanarian
Feb 28 2019 5:03am
Forum: Stand-up E-scooters and E-skateboards
Topic: AT-One electric inline skates (quick update Feb 2019)
Replies: 211
Views: 32844

Re: AT-One electric inline skates (quick update Feb 2019)

I have looked into a few of these reviews. The most common issue in I've come across is the battery. In my opinion I think having a battery is a good idea, but not as the main power source. Making a cover that goes over the top of the foot using mini solar panels. The battery however can be used a ...
by Vanarian
Feb 14 2019 5:30am
Forum: Items for Sale - Used
Topic: [EU] FS: 2x VESC controllers + BMS + more
Replies: 1
Views: 315

[EU] FS: 2x VESC controllers + BMS + more

Hi guys I'm selling some parts! Price + shipping to your location (I’m based in EU, France). Want to boost a bit some projets, so here I have for sale : - New unused VESC LM5109 based, made by Roger Wolff (BitWizard.nl & “rew” on Vedder’s forum), Vers 2.18 FW + a pair of 5v regulators - PCBs headers...
by Vanarian
Feb 13 2019 5:05am
Forum: Stand-up E-scooters and E-skateboards
Topic: AT-One electric inline skates (quick update Feb 2019)
Replies: 211
Views: 32844

Re: AT-One electric inline skates (quick update April 2018)

Small update, Got my old 3d printer out to make some prototypes. Getting the printer repaired, set up and calibrated and printed parts to fit with each other took almost all my time till now. Starting to print a few clutch designs I have for a proof of concept. Hey ! Did you manage to keep working ...
by Vanarian
Feb 12 2019 11:32am
Forum: Battery Technology
Topic: Cheapest Active Cell Balancer Project
Replies: 27
Views: 3218

Re: Cheapest Active Cell Balancer Project

Paralleling batteries you need to be careful, they need to be very close in voltage. I like to do it within 0.10V otherwise the equalization of current/voltage between the two battery packs will highly discharge one area of the battery to equal out the other part. Thanks for the tip ! Ok so as long...
by Vanarian
Jan 22 2019 8:21am
Forum: Battery Technology
Topic: Cheapest Active Cell Balancer Project
Replies: 27
Views: 3218

Re: Cheapest Active Cell Balancer Project

It is a very interesting circuit you made there and I am quite impressed by it actually. I know right ? He made a sick job, I'm still angry I never got around the Post office to try his proto. And yea it is kinda expensive for bigger builds, wasn't able to afford a full string back then. Keep me up...
by Vanarian
Jul 03 2018 2:48pm
Forum: Stand-up E-scooters and E-skateboards
Topic: AT-One electric inline skates (quick update Feb 2019)
Replies: 211
Views: 32844

Re: AT-One electric inline skates (quick update April 2018)

Yep ! These are a good choice to start with. I forgot, do you want to FWD, RWD or AWD your skates with the clutch ?
by Vanarian
Jun 28 2018 7:23am
Forum: Stand-up E-scooters and E-skateboards
Topic: AT-One electric inline skates (quick update Feb 2019)
Replies: 211
Views: 32844

Re: AT-One electric inline skates (quick update April 2018)

If you wanna try VESC despite the stories, note that it had become a lot more user friendly now with VESC-Tool! Auto detection helps a lot to get adequate parameters for your motor. Yep, gonna have to either cut the frames or adapt a sub frame to it! I've ridden many miles with 2 wheels per skate (a...
by Vanarian
Jun 22 2018 8:36am
Forum: Stand-up E-scooters and E-skateboards
Topic: AT-One electric inline skates (quick update Feb 2019)
Replies: 211
Views: 32844

Re: AT-One electric inline skates (quick update April 2018)

Haha careful with your boss ! Had the same happening to me before, even when you're on time with schedule it is still a problem :roll: Well yea that's pretty much it, when your ESC is advanced enough it can emulate the freewheel (it can also keep a bit of throttle to kill only the drag). I use VESC,...
by Vanarian
Jun 21 2018 1:32pm
Forum: Stand-up E-scooters and E-skateboards
Topic: AT-One electric inline skates (quick update Feb 2019)
Replies: 211
Views: 32844

Re: AT-One electric inline skates (quick update April 2018)

Not sure if I should start my own post or hijack this one(?) Seems most inline skate discussions happen here. I am done drafting my "small-scale" 2 way clutch, Inventor is telling me it will fail at ~3Nm, which is bad... A few short calculations imply that torque needed is 7.5 ~ 15Nm. Probably more...
by Vanarian
Jun 08 2018 7:37am
Forum: Motor Technology
Topic: Magnax, new axial flux motor
Replies: 16
Views: 1521

Re: New axial flux motor development

liveforphysics wrote:
Jun 01 2018 1:32pm
End turns always contributed to flux, just the flux the ends generates is on the wrong axis to be making rotational torque, and instead makes a balanced thrust axis force that net cancels.
Thank you for this tip, it means I'm not wasting my time right now trying to go hybrid!
by Vanarian
Jun 05 2018 4:27am
Forum: Stand-up E-scooters and E-skateboards
Topic: AT-One electric inline skates (quick update Feb 2019)
Replies: 211
Views: 32844

Re: AT-One electric inline skates (quick update April 2018)

Hi new to this forum, been a long time stalker of this thread. I've also wanted to design and build my own electric inlines for a long time, I am finally determined to start. Been procrastinating by going to the army for 2 years, going to university, getting a job for 3 years as an engineer. Time t...
by Vanarian
Apr 16 2018 9:13am
Forum: Stand-up E-scooters and E-skateboards
Topic: Off-road EV idea... need lots of help
Replies: 13
Views: 951

Re: Off-road EV idea... need lots of help

Hi, this is a nice project (and a bit complicated one if I may) ! I'm hooked into e-inlines so I got you there :lol: Off-road with inlines or similar makes corner a bit difficult when you got your wheels in the gravel / rocks / dirt / grass. There's also question of how much weight you'll be able to...
by Vanarian
Mar 17 2018 3:18pm
Forum: Battery Technology
Topic: DIY soft-latch single power button - need help finishing it
Replies: 2
Views: 408

Re: DIY soft-latch single power button - need help finishing it

Thank you for your input ! In the circuit diagram, I dont see any power for your NAND gate chip. Is that just left out of the diagram itself? Yes I left it out of the diagram for clarity but I feed a live 5V straight from the regulator to the NAND chip and ground back to the circuit. The anti-spark ...
by Vanarian
Mar 15 2018 9:48am
Forum: Battery Technology
Topic: DIY soft-latch single power button - need help finishing it
Replies: 2
Views: 408

DIY soft-latch single power button - need help finishing it

Soooo guys I'm trying to make a compact soft-latch power button(single momentary push button type). Required features are : - Circuit should always start in OFF position (auto-reset or power on reset) ; - Should work as quick press to power ON, hold 2 seconds to shut down ; - Must be compatible up t...
by Vanarian
Mar 15 2018 8:53am
Forum: Items for Sale - Used
Topic: More LTO cells ~3.5ah
Replies: 19
Views: 1873

Re: More LTO cells ~3.5ah

8.4kwlto.jpg 8.4kwlto1.jpg Can you please detail what we see ? packs are roughly 70x47mm and 100x47mm ? What is the thickness of both, what is the weight / pouch ? Which specs for both size ? At 1.50$ / piece it looks pretty affordable ; is it 2.4v 3.5Ah ? What is the max discharge per cell (I see ...
by Vanarian
Mar 10 2018 7:45am
Forum: Battery Technology
Topic: Lithium camera battery question
Replies: 2
Views: 241

Re: Lithium camera battery question

Thank you for the accurate infos, I'll hook it up o a charger to check ; eventually will open the case to check it before disposal. Hopefully it could still be ok!
by Vanarian
Mar 10 2018 6:17am
Forum: Battery Technology
Topic: Lithium camera battery question
Replies: 2
Views: 241

Lithium camera battery question

Hi guys, I salvaged a lithium 7.2v 2-cell SN750 battery from a camcorder and planned to use it for a cheap LCD light accessory. That's a 3700mAh battery and probably low amperage. Problem is : when I check voltage, it looks like it was emptied down to almost 0V. Am I right to think this is a future ...
by Vanarian
Feb 17 2018 7:07pm
Forum: Stand-up E-scooters and E-skateboards
Topic: AT-One electric inline skates (quick update Feb 2019)
Replies: 211
Views: 32844

Re: 3.2KW / 6KW inline skates (updated June 16th 2017)

https://www.youtube.com/watch?v=6m_iIbX0gmA i see the future in this type of motors (axial flux with permanent magnets). It is very easy to cool the coils becouse they are on each side of the rotor and not moving. Even some cryogenic cooling is possible in future. This can boost engine peak power t...
by Vanarian
Feb 08 2018 8:40pm
Forum: Stand-up E-scooters and E-skateboards
Topic: AT-One electric inline skates (quick update Feb 2019)
Replies: 211
Views: 32844

Re: 3.2KW / 6KW inline skates (updated June 16th 2017)

Hi! nice job man! im also developing engine for inline skates. I hope i will have working prototype assambled in next week. It is special kind of motor.. wheel is part of motor. Stator is mounted on the chassis. Setup is very light.. we will see about power and efficiency. I managed to mount powerf...
by Vanarian
Nov 23 2017 3:01pm
Forum: Forum Rules and Features
Topic: Let's get your feedback - upgrading the system to phpbb3.2.x
Replies: 22
Views: 10120

Re: Let's get your feedback - upgrading the system to phpbb3.2.x

Well my own theme never was standard on screen when browsing E-S (I got it all blackened out with only white and soft blue letters to make it more comfortable to read).

I noticed a bug : when posting while already connected, I have to reconnect anyway. Apart from that I like the new look !
by Vanarian
Oct 09 2017 3:26pm
Forum: Motor Technology
Topic: How to isolate (posibly shorted) stator lams?
Replies: 10
Views: 1083

Re: How to isolate (posibly shorted) stator lams?

Here is what I mean along with my poor micro photography intent. :D See produced by sand granule grooves and fold over metal to neighbouring lams, ripped out chunks folded over and pressed in between lams. Should I also cut a stator apart to see how lams are pressed on the assembly cage? If any int...
by Vanarian
Sep 25 2017 7:48am
Forum: Stand-up E-scooters and E-skateboards
Topic: Qiewa, SAY YEAH, or something else?
Replies: 1
Views: 535

Re: Qiewa, SAY YEAH, or something else?

Hi why not make your own based on a dirt scooter and electric bike parts? 1300$ is a steep budget which allows a quality build.
by Vanarian
Sep 09 2017 4:23pm
Forum: Stand-up E-scooters and E-skateboards
Topic: Meepo Board
Replies: 4
Views: 1323

Re: Meepo Board

https://cdn.shopify.com/s/files/1/2096/3333/products/IMG_20170719_094756R_530x@2x.jpg?v=1500520224 I'm not sure due to picture resolution but it looks like it is based on VESC with hardware mods (stm34 chip?) . It is possible that he's running a custom VESC firmware too. Would explain why he told t...