Or top of page 12 here DocumentDownload/LifePO4mkIIIPowerSupplyManual.pdf at master * iancanada/DocumentDownload * GitHub
There are also the updates included with LiFeP04 Mk 111.
There are also the updates included with LiFeP04 Mk 111.
It will take ~500hrs to stabilise fully. before that they one hr or half a day play fantastic and other day or hr will be rubish. i had 1000hr on mine.
Back pedalling a bit here but it seems I haven't had my 3 rails of 3v3 correct on the dual dac. I fed the 3 rails separately but that is it... performed no other mods.
So my 3 rails are still 'commoned'.
I think I understand from reading the manual that removing the small daughter boards breaks the links and does give us 3 separate rails?
I also read here somewhere about keeping the daughter boards but instead cutting some tracks. I am struggling to see these tracks. Does anyone have a picture?
Regards
James
So my 3 rails are still 'commoned'.
I think I understand from reading the manual that removing the small daughter boards breaks the links and does give us 3 separate rails?
I also read here somewhere about keeping the daughter boards but instead cutting some tracks. I am struggling to see these tracks. Does anyone have a picture?
Regards
James
Cheers Kirk's....having heen through a ton of this thread today I did happen upon jacklees posts but I dont have the confidence to make any cuts without images .
Thanks for the input though. ..I think I shall remove the daughter boards for now.
Thanks for the input though. ..I think I shall remove the daughter boards for now.
Yes I guess that is akin to breaking the little boards out but I read that there was some benefit of leaving them in for the small SMD caps
Just cut the track labeled “in” on two of the three and the 3rd will continue to get power from the original screw terminals.
Thanks for all the help thus far and apologies for being a bit green with this. I really dont wish to screw up this DAC.
So I have sussed out the 'IN' trace on the underside. It is surrounded by the ground plane so I would need to make sure I dont create a short where I cut....make sure it's a clean gap between the two .
So should I cut the traces where I have marked. That will isolate the 3 power rails from each other?
Thanks again
So I have sussed out the 'IN' trace on the underside. It is surrounded by the ground plane so I would need to make sure I dont create a short where I cut....make sure it's a clean gap between the two .
So should I cut the traces where I have marked. That will isolate the 3 power rails from each other?
Thanks again
Attachments
Is that not the incoming + rail (that connected to the + power terminal)?
I don't think you need to cut this. If you have 3 external battery 3V3 rails none will connect to this rail anyway. If you have 3 local 3V3 regulators these will need power (+5V) from this rail.
Also this rail is not broken by removing the daughterboards.....
I don't think you need to cut this. If you have 3 external battery 3V3 rails none will connect to this rail anyway. If you have 3 local 3V3 regulators these will need power (+5V) from this rail.
Also this rail is not broken by removing the daughterboards.....
NO.
Are you trying to feed 3 x 3.3 V rails to the DAC ?
If so you cut from the other other side of the board, there are 3 bridges between mother and daughter board these have the tracks under the mask.
You can fit 2 pin connectors if you file the pins down a little.
An externally hosted image should be here but it was not working when we last tested it.
Cut the one's marked 'IN'.
Then feed +Ve to the daughter board 'in' and ground to either ground pin. This leaves the caps connected.
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Thanks again all.
Yes I am feeding 3 seperate 3v3 rails into the dac....not feeding in a higher voltage and using 3 separate onboard regs.
Simon has been in touch also and sent me a photo so I know what I'm doing now.!
Yes I am feeding 3 seperate 3v3 rails into the dac....not feeding in a higher voltage and using 3 separate onboard regs.
Simon has been in touch also and sent me a photo so I know what I'm doing now.!
I had a request to share the information on cutting the 3v3 rails clearly as Simon had helped me with via PM so here I share an image.
Hopefully this helps others that are less adept at all this much like myself.
And to quote
"Cut the in track where it bridges the gap between main and daughter boards. On mine I cut two for external regs and supercapped the 3rd which remains uncut. Leave the underside as is, no need to cut that, then you can undo any cut by bridging with wire on top if required"
Hopefully this helps others that are less adept at all this much like myself.
And to quote
"Cut the in track where it bridges the gap between main and daughter boards. On mine I cut two for external regs and supercapped the 3rd which remains uncut. Leave the underside as is, no need to cut that, then you can undo any cut by bridging with wire on top if required"
