Search found 130 matches

by akiraEC
Oct 27 2018 7:30am
Forum: Battery Technology
Topic: DIY ajustable current source : test cell fuse wire
Replies: 18
Views: 575

Re: DIY ajustable current source : test cell fuse wire

Hi all, I discussed a bit the proposed circuit on electronics.stackexchange. https://electronics.stackexchange.com/questions/400514/adjustable-high-current-source-40a https://electronics.stackexchange.com/questions/403152/parallel-mosfets-to-get-more-current-40a-adjustable-current-source https://ele...
by akiraEC
Oct 15 2018 9:05am
Forum: Battery Technology
Topic: DIY ajustable current source : test cell fuse wire
Replies: 18
Views: 575

Re: DIY ajustable current source : test cell fuse wire

100A. That'a also the range of max current I got for usual 18650 used in eskateboards. I am using HE4 which are very similar to 25R. It'll be complicated for me to generate such a strong current in order to test my fuses ... I designed the parts for 40$ (continuous). Maybe I can go higher for shorte...
by akiraEC
Oct 15 2018 4:40am
Forum: Battery Technology
Topic: DIY ajustable current source : test cell fuse wire
Replies: 18
Views: 575

Re: DIY ajustable current source : test cell fuse wire

I use dia 0,3mm copper wire as fuse, for my packs, built from Panasonic PF cells. My design criteria was, individual cells should be able to blow their own fuse any case. My boundary conditions were: 1. At 10A (max current of PF) the wire should be warm, but still touchable by naked fingers. 2. At ...
by akiraEC
Oct 14 2018 6:51am
Forum: Battery Technology
Topic: DIY ajustable current source : test cell fuse wire
Replies: 18
Views: 575

Re: DIY ajustable current source : test cell fuse wire

40A fuse is also somewhere I was aiming for. I am using HE4 LG cells which have 20A continuous discharge rating. I think that it is more than double when shorted. A 40A fuse would be nice even for a 3p pack (better for a 4p of course). I have ordered a LM4040 for reference voltage (with resistors fo...
by akiraEC
Oct 12 2018 2:55am
Forum: Battery Technology
Topic: DIY ajustable current source : test cell fuse wire
Replies: 18
Views: 575

Re: DIY ajustable current source : test cell fuse wire

That circuit might work OK but the 1k resistor needs to be much lower, like 1mOhm so it can handle 40A. And the FET would get super hot, but if the fuse blows right away, the thing won't have time to heat up much. It needs a fuse too, in case the output gets shorted and the FET blows. You could use...
by akiraEC
Oct 12 2018 2:51am
Forum: Battery Technology
Topic: DIY ajustable current source : test cell fuse wire
Replies: 18
Views: 575

Re: DIY ajustable current source : test cell fuse wire

Hi Addy, Thank you !! My knowledge in electronics is quite limited, so I am very grateful for you help (not only you but all of you)! Would you have suggestions for the FET ? I have found some 200A capable FETs in DirectFET package : https://www.mouser.fr/ProductDetail/Infineon-IR/IRF7749L1TRPBF?qs=...
by akiraEC
Oct 11 2018 4:13am
Forum: Battery Technology
Topic: DIY ajustable current source : test cell fuse wire
Replies: 18
Views: 575

DIY ajustable current source : test cell fuse wire

Hello, I'd like to build my battery pack with cell fuses. I can look at tables to choose the best wire gauge but ultimately, I'd like to test it with real current. The idea would be to flow an increasing current in the fuse wire to test two things : - it does not get too hot under normal load. - it ...
by akiraEC
Oct 30 2016 4:10pm
Forum: Items for Sale - New
Topic: Pulley for kegel orangatang
Replies: 19
Views: 2521

Re: Pulley for kegel orangatang

Hello Idea I'd be interrested in bying some pulleys but I am not sure I understand how the bolts are fixed on the pulley. Are you screwing the bolts directly inside the ABS ? Wouldn't a counter metal nut sunk in the ABS of the pulley be much more durable ? Something like this (in reverse). http://ww...
by akiraEC
Oct 16 2016 10:00am
Forum: Stand-up E-scooters and E-skateboards
Topic: CC licence and VESC
Replies: 7
Views: 899

CC licence and VESC

I would like to raise a discussion regarding the coverage of Creative Common licence and PCBs in projets. When a project is released using the CC licence (software, firmware, BOM, schematics and PCBs), is it compliant to modify it and NOT publish the PCB files ? To my understanding it is not. The CC...
by akiraEC
Sep 16 2016 2:24am
Forum: Stand-up E-scooters and E-skateboards
Topic: How To Solder Your Own VESC!
Replies: 62
Views: 11069

Re: How To Solder Your Own VESC!

Thanks for your precious input.
I might use the oven for the other components and use the more traditionnal methods for the ARM and DRV.
Anyway it is always useful to hear from other people experience.
by akiraEC
Sep 13 2016 4:43am
Forum: Stand-up E-scooters and E-skateboards
Topic: How To Solder Your Own VESC!
Replies: 62
Views: 11069

Re: How To Solder Your Own VESC!

I don t understand why it would not work with a reflow oven. I was intending to try ... can you explain the problem ??

And I do not see how you solder the ground pad behind the chip. The pins, I understand, but the ground pad ??
by akiraEC
Aug 22 2016 2:59am
Forum: Stand-up E-scooters and E-skateboards
Topic: 10S custom skate ESC: testers wanted!
Replies: 1520
Views: 187349

Re: 10S custom skate ESC: testers wanted!

Thank you very much !!
I will try it and report back.
by akiraEC
Aug 19 2016 4:47pm
Forum: Stand-up E-scooters and E-skateboards
Topic: 10S custom skate ESC: testers wanted!
Replies: 1520
Views: 187349

Re: 10S custom skate ESC: testers wanted!

Hi There,
I just bought a reflow oven to try soldering my VESC.
Do you have experience with stencils ? metal or plastic ?
Is OSHstencil reliable ? What kind of files do I have to send them ?

Any other source of stencils for the VESC ?

Thanks for your help !
Akira
by akiraEC
Aug 13 2016 3:53pm
Forum: Items for Sale - New
Topic: Vedder Anti-Spark switches. Extras for sale.
Replies: 23
Views: 8185

Re: Vedder Anti-Spark switches. Extras for sale.

Where are you located ?

Envoyé de mon ASUS_Z00AD en utilisant Tapatalk
by akiraEC
Jul 21 2016 10:07am
Forum: Stand-up E-scooters and E-skateboards
Topic: Carbon Jet Spud / Freebord Bindings / 10S3P
Replies: 13
Views: 5072

Re: Carbon Jet Spud / Freebord Bindings / 10S3P

Superb work.
I am very impressed by how clean your work with the router is.
by akiraEC
Jul 13 2016 9:22am
Forum: Items for Sale - New
Topic: Pulley for kegel orangatang
Replies: 19
Views: 2521

Re: Pulley for kegel orangatang

Hi,
In which material are you printing ? PLA ? ABS ?
Cheers
by akiraEC
Jun 24 2016 2:36am
Forum: Stand-up E-scooters and E-skateboards
Topic: How To Solder Your Own VESC!
Replies: 62
Views: 11069

Re: How To Solder Your Own VESC!

Hai Galp,
I would very much like to see your tips on soldering a VESC.
I also have only a soldering iron and a hot air gun.
I would greatly appreciate to see your experience and knowledge.
by akiraEC
Jun 21 2016 6:37am
Forum: Stand-up E-scooters and E-skateboards
Topic: Loaded Vanguard Carbon Cast Ronin Single VESC 10S4P
Replies: 106
Views: 25064

Re: Loaded Vanguard Carbon Single VESC SK6374 10S4P

whitepony wrote:hey akira! order of things:
Thank you so much !!
Now I see a bit better how to do it.
by akiraEC
Jun 20 2016 3:09am
Forum: Stand-up E-scooters and E-skateboards
Topic: Loaded Vanguard Carbon Cast Ronin Single VESC 10S4P
Replies: 106
Views: 25064

Re: Loaded Vanguard Carbon Single VESC SK6374 10S4P

Hi Whitepony I would like to go the channel way to make the cable disappear. I did not quite understand what you fineally did to fill in the channels. Have you used glue or resin ? Did you glue the bullet connectors before putting the resin ? Anyway, your build is amazing !! I wish I could do mine h...
by akiraEC
Jun 16 2016 11:42am
Forum: Stand-up E-scooters and E-skateboards
Topic: 10S custom skate ESC: testers wanted!
Replies: 1520
Views: 187349

Re: 10S custom skate ESC: testers wanted!

okp wrote:thanks a lot !
Soldering a VESC ??
:-)
by akiraEC
May 16 2016 4:46am
Forum: Stand-up E-scooters and E-skateboards
Topic: Future Motion - OneWheel
Replies: 9
Views: 651

Re: Future Motion - OneWheel

I mean, people will get scared if they think that this is the normal way of riding it !!!!
:mrgreen: :mrgreen: :mrgreen:
by akiraEC
May 16 2016 3:44am
Forum: Stand-up E-scooters and E-skateboards
Topic: Future Motion - OneWheel
Replies: 9
Views: 651

Re: Future Motion - OneWheel

Great !!
But you should add some footage with the regular way of riding it, shouldn't you ?
by akiraEC
Apr 20 2016 6:52am
Forum: Stand-up E-scooters and E-skateboards
Topic: Soldering CMS VESC : which paste for air gun
Replies: 1
Views: 288

Soldering CMS VESC : which paste for air gun

Hi guys,

I am about to start soldering my first VESC.
I have some experience with CMS soldering but I did it with a regular iron.
This time I have bought a hot air gun.

My question is :
What kind of solder paste do you use with the hot air guns ?

Any input welcome !!