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Brett's Arduino 8x Smart Charger / Discharger
#41
Nah, you just use Via's to jump all over the place Tongue Yeah, would be insane to build that way with 2 layer
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#42
Double side, SMD, 2 layer with vias, those are not issues. The only issue is ... those 18650 are huge :-).

The light gray line represents just one cell of the battery holder:



!

KR,

Vincent
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#43
(07-28-2018, 04:14 PM)vdeconinck Wrote: Double side, SMD, 2 layer with vias, those are not issues. The only issue is ... those 18650 are huge :-).

The light gray line represents just one cell of the battery holder:

But do you have cells on "both" sides of the PCB? That's what the joke was about. Having the charging/discharging circuitry in such a way that both sides of the PCB are utilized with twice the number of holders.
Proceed with caution. Knowledge is Power! Literally! Cool 
Knowledge is Power; Absolute Knowledge is Absolutely Shocking!
Certified 18650 Cell Reclamation Technician

Please come join in general chit-chat and randomness at Discord Chat (channels: general, 3d-printing, linux&coding, 18650, humor, ...)
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#44
Yeah. That's the reason why what Korishan said was funny.
The power of lithium ion is in our hands!
We'll show them what we're made of!
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#45
(07-28-2018, 09:43 PM)Korishan Wrote: But do you have cells on "both" sides of the PCB?

With a holder taking almost 8x8cm, there's not much room for the rest if you put one on each side :-)

The good solution would be to put the holder outside of the main board, but having it dangling is not suitable at all.

Now that I think of it, most PCB makers have a minimum order quantity of 5 pieces. An idea would be to make the boards twofold: either you populate the SMDs and it behaves as a "motherboard" or you populate the battery holder, MOSFETs and resisitors, and behaves as a daughterboard. Then you connect them together (in a chain or like a puzzle) and you get a 16-cell charger in one order. That would be a great challenge !

But, well, the SMD components and controller parts are only worth about 5 or 6 dollars, so in the end, just populate as many boards as you need and you get up to 5 independant chargers (up to 20 cells) for 5 bucks in PCBs :-)

KR,

Vincent
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#46
First (known) person that is building the version 2.0 of this Arduino 8x Smart Charger / Discharger
Chris D

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#47
(08-02-2018, 11:11 PM)brettwatty Wrote: First (known) person that is building the version 2.0 of this Arduino 8x Smart Charger / Discharger
Chris D


awesome!!!! Really cool to see others working with it.

(08-02-2018, 11:22 PM)CrankyCoder Wrote:
(08-02-2018, 11:11 PM)brettwatty Wrote: First (known) person that is building the version 2.0 of this Arduino 8x Smart Charger / Discharger
Chris D


awesome!!!! Really cool to see others working with it.

he posted part 2 and 3 already!


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#48
Hi, Brett, good work on this setup! Is the database side complete too?

Really interested in setting it up, just need to figure out where i can get the PCB printed in the UK... or if anyone is interested in 4 of these pcb's if i order the min 5 at cost + postage!
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#49
(08-03-2018, 03:04 PM)unclebob Wrote: Hi, Brett, good work on this setup! Is the database side complete too?

Really interested in setting it up, just need to figure out where i can get the PCB printed in the UK... or if anyone is interested in 4 of these pcb's if i order the min 5 at cost + postage!

Hey mate, the DB Portal is still under development but it does work. The first bunch of users will get a separate copy of the page and DB but I am currently working on a central version where people can signup and get a unique code for their Charger / Discharger to send the data.

Cheers,
Brett
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#50
Just ordered 5 sets. need 3. will have 2 boards and all the parts for 2 complete minus the power supply, bar code scanner and printer available.


Thanks for the great work Brett!!!!
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