Smart Switch V4 "Intelligent low voltage cutoff switch"

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kfong
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Re: Smart Switch V4 "Intelligent low voltage cutoff switch"

Post by kfong » Feb 26, 2013 11:41 pm

Unfortunately I have very little time to devote to ebike stuff these days. Jason had to wait a while before I had time to build it. I have also promised another member but have yet to find time to complete it. If you are willing to wait, send me a PM and to get on a list. Maybe I can get few done once I start. No promises since I won't take any money for pre-orders. Working full time so you will have to be patient. Once riding season starts for me, then forget about it :roll: If you have electronic skills, the bare boards are still available.

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Re: Smart Switch V4 "Intelligent low voltage cutoff switch"

Post by chroot » Mar 04, 2013 3:30 pm

Hi Kfong,

Count me in, if you are going make these smart switch and I would buy you 2 or 3 smart switch no time! I would love build my own and I dont have exactly good equipment like you have.

I still running smart switch on cargo ebike, After the headway battery got fire then I moved to my old Tidalforce ebike, My fiancee and I absolutely love the smart switch made so simple for us.

Let me know when you are able make the smart switch and I must have it for my cromotor racing ebike.
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Re: Smart Switch V4 "Intelligent low voltage cutoff switch"

Post by majornelson » Oct 09, 2013 9:23 pm

Any more of these available?
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cal3thousand
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Re: Smart Switch V4 "Intelligent low voltage cutoff switch"

Post by cal3thousand » Oct 10, 2013 1:27 pm

I'm interested to know how would this be integrated with Method's protection kit?

I'd be willing to buy a bare board for my 24S setup
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kfong
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Re: Smart Switch V4 "Intelligent low voltage cutoff switch"

Post by kfong » Oct 10, 2013 9:27 pm

Sorry guys, there are no bare boards left. If I have time this winter, I will make another run. Already have ideas on a new version.

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Re: Smart Switch V4 "Intelligent low voltage cutoff switch"

Post by rborger73 » Feb 21, 2014 8:28 am

I'm interested if you did any of these up in the winter. Looking for plug and play for a 12s system. My only difference would be I'd like to add a keyswitch that has ON - OFF - and Armed. I have a dc convertor I'd like to keep powered but cut power to the controller. Reason being I have a security system with 2 way pager. So I'd like to have this then have a keyswitch for powering fully off and also for running into the store to kill just controller. Will send you a pm as well.

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Re: Smart Switch V4 "Intelligent low voltage cutoff switch"

Post by jmirabil » Oct 13, 2015 6:21 pm

This is awesome...
Dare I ask, any hope of getting one of these for a 32S setup, like 150V max voltage? Looking to use with a Lyen 4115 24 Fet controller as my simple inline BMS.

Yep, 32S... I like to go 60mph :) I like the 4.1 to 5
3.5 V range on packs to give optimal life to LiPo's.

If no, any of these available with XT90 connectors and the full boxed on/off button enclosure prebuilt?

Would regen need to be off, as the back-regen emf might kill your setup????

Any such solution? Any advice welcomed...

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Re: Smart Switch V4 "Intelligent low voltage cutoff switch"

Post by kfong » Oct 17, 2015 9:25 am

Sorry, I've been too busy on my own projects and work. Perhaps this winter I will find time since I need a few built for myself.

As for the higher voltages or performance setups. You would be limted to the specs on the 4011 fets. My setup was designed for the average ebike of 75 volts or less, since there isn't any heat sink used.

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Re: Smart Switch V4 "Intelligent low voltage cutoff switch"

Post by steveo » Oct 22, 2015 11:23 pm

this is pertty cool, any demo video?
wow this thread is old lol...
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