how can i implement usb charging in a mod

[5cardstud]

Them are for li-poly will they work correctly on li-ion batteries?

 

[crouton976]

Take a look here: https://shop.maxim-ic.com/storefront/samplecart.do?event=SampleNow&partnumber=MAX1555EZK+&rownum=0#

Then here: QuickView - MAX1551, MAX1555 SOT23, Dual-Input, USB/AC Adapter, 1-Cell Li+ Battery Chargers

But, 1st, sign up with them so you can get free samples.

As pointed out, get the samples from Maxim-IC. I ordered them and got them in about 5 days or so.

The board from Sparkfun measures 4cm x 4cm, which is almost 2" x 2" (1"=2.54cm)... that's a lot to try to cram in a battery enclosure, and the alternative is a rather large and in charge mod. Also, look at the pic of the board from Sparkfun... the teeny tiny chip directly behind the mini USB port is the chip that controls the charging.

Maybe contact cybervex and see if he'd sell you just the custom PCB, that way you get the USB charging and still get your hands on time?

-Creighton

 

[Sci]

Them are for li-poly will they work correctly on li-ion batteries?

Don't know about that, but it is a good point. From the Maxim site about their charger chips:
The MAX1551 and MAX1555 charge a single-cell lithium-ion (Li+) battery from both USB* and AC adapter sources. They operate with no external FETs or diodes, and accept operating input voltages up to 7V.

 

[misterD]

thanks, sci and global! so the one on ebay is a bit better than the 510 one (only 200maH output charge against 300) but kinda of the same than sparkfun. cos it seams that the charger itself is made in indonesia...
and Sci, your beagle rocks i have a puggle