Search found 539 matches

by Vanarian
Jul 03 2018 2:48pm
Forum: Stand-up E-scooters and E-skateboards
Topic: AT-One electric inline skates (quick update April 2018)
Replies: 205
Views: 29471

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 April 2018)
Replies: 205
Views: 29471

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 April 2018)
Replies: 205
Views: 29471

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 April 2018)
Replies: 205
Views: 29471

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: 1162

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 April 2018)
Replies: 205
Views: 29471

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: 821

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: 345

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: 345

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: 1634

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: 204

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: 204

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 April 2018)
Replies: 205
Views: 29471

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 April 2018)
Replies: 205
Views: 29471

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: 9619

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: 985

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: 477

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: 1194

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...
by Vanarian
Jul 29 2017 4:12am
Forum: Stand-up E-scooters and E-skateboards
Topic: Titanium foldable e-scooter TROLLI
Replies: 11
Views: 1550

Re: Titanium foldable e-scooter TROLLI

Ok thank you for all the infos ;) that's some serious torque you got there! 30km/h with climbing and good range is also big plus, not many people will go past this speed. VESC is really great, that's what I'm using too (somewhat custom version and intend to go further custom). Main advantages would ...
by Vanarian
Jul 27 2017 8:41am
Forum: Stand-up E-scooters and E-skateboards
Topic: Titanium foldable e-scooter TROLLI
Replies: 11
Views: 1550

Re: Titanium foldable e-scooter TROLLI

Also, question question for Vanarian, what are the other popular e-skate communities these days? Hi :) mainly I see Reddit and electric skateboard builders, e-sk8.fr and .de are also working fairly active and regular with many core members. I have hard time using reddit because of the format, though.
by Vanarian
Jul 27 2017 4:03am
Forum: Stand-up E-scooters and E-skateboards
Topic: Titanium foldable e-scooter TROLLI
Replies: 11
Views: 1550

Re: Titanium foldable e-scooter TROLLI

Hi, from your description and the pictures I see that a huge amount of love and work has been poured into your scooter. Big kudos for that. Now you may have a similar problem than me : your communication is not great! No offense here, let me explain :wink: I come here daily and it took me a month be...
by Vanarian
Jul 25 2017 10:08am
Forum: Stand-up E-scooters and E-skateboards
Topic: Buy E-skateboard OR make DIY e-skateboard?
Replies: 2
Views: 907

Re: Buy E-skateboard OR make DIY e-skateboard?

You've come to ES. You've already took a first step toward building your board ;)

Make a little effort, it is super easy nowadays to make a custom powerful and reliable board. Nothing like few years ago.
by Vanarian
Jul 24 2017 4:24am
Forum: Battery Technology
Topic: DIY nickel-plating onto copper cell connections
Replies: 30
Views: 3569

Re: DIY nickel-plating onto copper cell connections

Stupid question from stupid me :P Why not plasti-dip the whole connections with spray after battery is assembled? It solves the copper corrosion problem and adds better protection against wet. Should also be easier right? Edit : to ensure not to make a mess you can also stick filter to only spray on...
by Vanarian
Jun 27 2017 8:57am
Forum: Motor Technology
Topic: VESC-controller
Replies: 146
Views: 28543

Re: VESC-controller

Your board size 160x90 mm is kind of big. Too big for an ebike IMHO. I like VESC-X size. The case is 64x64x22mm. Perfect fit with 18650 cells. This isn't for ebikes. Buy a VESC-X I did, but it would be nice to buy controller that can handle more power. VESC-X can only go up to 60A and 10S (recommen...
by Vanarian
Jun 24 2017 7:20am
Forum: Battery Technology
Topic: The most powerful 18650
Replies: 26
Views: 2514

Re: The most powerful 18650

LG HB series no contest as far as continuous high amp and low temperature go. (under 80 degrees) 30A without problems. Highly underrated here because of low capacity. For above 90 degrees Sony VTC5A higher voltage and same discharge capacity. For bigger size, Samsung 21700-30T as said above. Super d...