Tír Na HiFi

For single LiFePo4 battery you can use charger boards based on TP5000 IC - very low back leakage & no need for switch or relay to isolate battery Indicator Led to show CC/CV charging & fully charged - 2 Amp CC when used with small heatsink, otherwise 1-1.5Amp & 3.6V max voltage Using som...

Thanks Randy - I presume you still need a relay/switch between each battery & it's charger to isolate it or is there very little current leakage draining the batteries?

With my battery powered devices there is no discernible difference between running solely off battery or from battery with charger attached. I'm not sure I undertake what you are saying? Absence of discernable difference I wouldn't have thought counted as absence of CM noise. CM noise might not str...

Yes, interesting, Pearse - it seems to be the same effect as battery power - have you tried these DC cables with battery power - did it make any difference?

I've seen this mistaken thinking before - they think that simultaneously charging a Lifepo4 while powering circuit from it is going to let noise through to circuit so they think they need to completely isolate power to circuit from mains charging. For common-mode noise this is true - isolation is o...

I'd be curious, maybe the tank only has to be a certain size Maybe esr plays a bigger part in combination with capacity Though not sure if I'm so curious I'll run out and buy 20 of these supercaps Yea, Abrax experiments with large banks of ordinary electro caps seemed to suggest that ESR + capacity...

multiple bruteforce charging regulators could work in more demanding applications like class a amp will be just as expensive as batteries id assume but maybe a little simplier I'm not sure - I think the main advantage of LiFePO4 batteries is their huge current output so whatever sudden current dema...

nige2000 wrote: ↑Wed Jun 13, 2018 11:21 pm if i remember right it uses mosfets and ref voltage and a single ps
kinda charges like a voltage divider would

Any, circuit diagram?

It's OK, I got it

https://hackaday.io/project/9072-open-a ... harger-pcb

yea i think there overcomplicating it switching between charge and discharge seems like a real pain if the caps cant function 'as good' in a normal simultaneous charge/discharge situation im really not seeing the point I've seen this mistaken thinking before - they think that simultaneously chargin...

Forgot to mention that I would add a small value, current limiting resistor between the output of the vreg and the super cap, for the reason John mentioned. Sometimes I add them on my lifepo4 circuits, to make sure my vreg's don't get too hot. EDIT: Heres the solution https://www.mouser.com/Product...