fixing 'not charging' with mini/nano2G (and possibly others)
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fixing 'not charging' with mini/nano2G (and possibly others)

by adafruit on Fri Jan 05, 2007 4:58 pm

The latest apple ipod firmware has changed how many of the devices cope with the D+/D- resistors on usb chargers. :?

to fix, try removing R5 or performing this hack
http://www.ladyada.net/make/mintyboost/ ... hackforv11

future mintyboost revisions will improve the design w/respect to this sort of thing. but this will make it work!
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by zyro70 on Sat Jan 06, 2007 2:16 am

I just tried it and my minty now works with my ipod nano 2g and ipod video 5.5g without having to restart

thanks for the fix!
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by 99EclipseGSX on Mon Jan 15, 2007 2:28 am

zyro70 wrote:I just tried it and my minty now works with my ipod nano 2g and ipod video 5.5g without having to restart

thanks for the fix!


Did you remove the R5 or switch it to +? I've tried all 3 combinations with the 1.1 kit and none work. It just discharges.
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by Caleb on Mon Jan 15, 2007 7:48 pm

same question. can i just remove the r5 switch? just snip it off?

also, i don't quite get the section on speeding charge time. how do i increase it past 100ma?
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by adafruit on Mon Jan 15, 2007 8:32 pm

ignore the "speed up" thing unless you are really interested in details

i would try both removing and tying to + to see which one works for you. like i said, its a quick fix and im not 100% sure it works in all circumstances so feedback is useful
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by pebob on Tue Jan 23, 2007 1:51 am

What should I expect the charge current to be on an iPod 30G? I'm measuring .223A with the iPod off, and .246A when it is on. It appears to be charging, but the only way it works is if I plug it into the MintyBoost while it is off. Also, am I correct that your fix (aka v1.2) changes R5 from a "pull down" to a "pull up" resistor? Now both D+ adn D- are both pulling up to the + voltage on the battery? Or did I miss something?

Thanks[/quote]
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by adafruit on Tue Jan 23, 2007 2:07 am

yup 250mA is pretty good, if its on then its probably running off of the battery and not charging (or charging slower) because it will last longer that way.
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by pebob on Tue Jan 23, 2007 9:40 am

Thanks... note of clarification, the 223mA is battery drain. I have not measured the supply current to the iPod
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R5 install or not to install

by wandering on Thu Mar 01, 2007 5:56 pm

Just finished building my MintyBoost, my first ever electronic project, and it WORKS! First time. I'm shocked my soldering worked. Guess beginners luck. I decided not to install R5, to see if it would work. I figured that if it didn't, it would easier to add it then to remove and resolder.

My question is should I leave success alone and finish assembling the components in the Minty can? Or should I install R5? I have a iPod Video with the l.2.1 firmware update.

Thanks adyada. I had a lot of fun with this and it will get a lot of use this summer. Put together a solar panel to recharge the batteries, then the MintyBoost will keep my iPod up and running. See ya' on the road...
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by adafruit on Thu Mar 01, 2007 11:57 pm

if it works, leave it be! only fix -broken things- is my motto ;)
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by Jama on Thu Mar 22, 2007 5:38 pm

ladyada wrote:if it works, leave it be! only fix -broken things- is my motto ;)


One of my motos is similar, " If its not broke, dont fix it" :D
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by Psymiley on Thu Mar 22, 2007 8:21 pm

ladyada wrote:if it works, leave it be! only fix -broken things- is my motto ;)

Boooring! :lol:

Mine's: "If it has room, it has features (just it may not know it yet)"
or
"Get 2 not 1, first's a keeper, second's for fun"

8)
I wish I were payed in hexadecimal by an accountant that only understands decimal :D
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by Moses_410 on Wed Jul 04, 2007 11:56 am

quick question about the R5 resistor. when i put it into pull-up does it matter which side of the resistor i connect to the + battery terminal? right now i have one end through the hole with two rings around it and one end in the + for batery. Does it matter which way i put them? i couldnt see in the pictures...
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by adafruit on Wed Jul 04, 2007 12:46 pm

resistors are nondirectional
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by Moses_410 on Wed Jul 04, 2007 1:40 pm

yeah, i dont mean which direction, i mean which physical hole in the PCB should it be through? should one end be through the double-ringed hole at R5 and one in the +? OR should the resistor not be in the double ringed hole and be connected to the no-ringed hole at R5 and the +?
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