minty boost v3 with 3gs eeeeek help
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minty boost v3 with 3gs eeeeek help

by layums on Tue Oct 02, 2012 11:57 am

Hi, i recently received your v3 kit.

its all connected and soldered up but my pesky 3gs is playing the not working game. i tried soldering the ground pin on usb to usb plug casing. but no joy.please can you help. i get 5.00v on the outside reading and 1.94 on both the middle 2....

problem?? :-)
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Re: minty boost v3 with 3gs eeeeek help

by layums on Tue Oct 02, 2012 12:00 pm

more photos
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Re: minty boost v3 with 3gs eeeeek help

by adafruit_support_bill on Tue Oct 02, 2012 2:23 pm

Did you try shorting the two center pins (D1 & D2) together?
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Re: minty boost v3 with 3gs eeeeek help

by layums on Tue Oct 02, 2012 4:10 pm

Yep done that. No joy.
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Re: minty boost v3 with 3gs eeeeek help

by adafruit_support_bill on Tue Oct 02, 2012 5:29 pm

Do the voltage measurements stay relatively steady when you connect the 3Gs, or do they drop a bit?
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Re: minty boost v3 with 3gs eeeeek help

by layums on Wed Oct 03, 2012 6:17 am

voltages stay steady. i just connected a 4 AA NiMH battery holder. 5v and 1.97v are the two readings now. still no joy with 3gs
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Re: minty boost v3 with 3gs eeeeek help

by adafruit_support_bill on Wed Oct 03, 2012 6:40 am

Sounds like the Minty is performing to spec and your batteries are up to the task. Unfortunately, the 3Gs is one of the most finicky phones out there.
You might also try using a different cable. Sometimes a marginal connector contact or the voltage drop across the cable will cause problems.
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Re: minty boost v3 with 3gs eeeeek help

by layums on Wed Oct 03, 2012 6:42 am

anybody else got any suggestions? this is supposed to work. it does on an ipod touch. grrrrrrr.
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Re: minty boost v3 with 3gs eeeeek help

by layums on Thu Oct 04, 2012 6:04 am

It works!!!!!! she is alive without a cord to the wall!!!

Minty boost v3 with Iphone 3GS works no problem, even without original white iphone lead!!! No modifications required, no changing of resistors.

Just use Eneloop ready to use rechargeable battery from Sanyo HR-3UTGA 1.2V 2000mAH with a minimum of 1900mAH.

Have fun! I know i am not going to have the can't speak battery is low conversation again!
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Re: minty boost v3 with 3gs eeeeek help

by adafruit_support_bill on Thu Oct 04, 2012 6:39 am

That's good news :D Eneloops are good batteries. Are you still using the 4xAA pack?
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Re: minty boost v3 with 3gs eeeeek help

by layums on Thu Oct 04, 2012 6:42 am

Yes. It's got a switch. Although will pob mod it to a bigger switch.

What should get if I want to charge those batteries via USB and keep them in the holder.
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Re: minty boost v3 with 3gs eeeeek help

by adafruit_support_bill on Thu Oct 04, 2012 7:15 am

We don't have anything in our store that will do that. Sanyo does make a USB charger for the eneloops, but it only does 2 cells at a time. I have seen 4-cell USB chargers too, but I don't have any experience with them.
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Re: minty boost v3 with 3gs eeeeek help

by layums on Sat Oct 06, 2012 11:42 am

Hi, one more thing. Where in the Circuit can i place an LED light, so its lit when the switch is on. I have tried a few places but the voltages change. wondering if you have the ideal place.
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Re: minty boost v3 with 3gs eeeeek help

by adafruit_support_bill on Sat Oct 06, 2012 12:57 pm

I would put it across the battery leads. As an indicator light, you don't need to run the led at max brightness. If you use a fairly high value resistor (1K or more) the exact voltage is not critical.
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Re: minty boost v3 with 3gs eeeeek help

by Nramond on Thu Nov 08, 2012 4:33 pm

Hi,
I would like to share my experience as I'm just a beginner so when something works I'm happy to share! :)
I ordered a Mintyboost at Adafruit and first thing I want to say it's not working at all with 2 AA battery on a iphone 3gs.
I tried a couple of battery before finding one is working great !
It's a battery I have taken from a laptop who died, a Li-ion 4.2v.
AND IT WORKS!
I'm so happy. :)
I will give more detail on the charging time and the amount of charging when the battery will run out.
And don't forget to solder the middle usb center.
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