Hello Ladyada!
You've done perfect job, Minty has great design and it's well documented!
I'm going to order it, but I'm afraid of following - my Pocket Loox 720 require s much more power, than 100mA. Even connected to USB (500mA) it charges veeery slowly. As I know, it needs 1A... So, is it possible to change schematics to produce more power? I found similar IC MAX608 can give 1A, but it has different pinout and control, than MAX756.
http://rocky.digikey.com/scripts/Produc ... =MAX608EPA
What do you think about this case?
Andrew
MintyBoost 1A ?
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Please be positive and constructive with your questions and comments.
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most chips that give more power need an external switch. you can try making it on a breadboard. AA's dont like giving more than 1A at a time, so efficiency will go down. you could always just use it to tricklecharge!
another thing is, if you plug it into usb to charge its not allowed to ever take more than 500ma.
also, what it says on the side is always overstated for safety reasons.
another thing is, if you plug it into usb to charge its not allowed to ever take more than 500ma.
also, what it says on the side is always overstated for safety reasons.
more current also
I was thinking of doing the same things for adding more current then 100mah. I was thinking of charging multiple devices at the same time. Say a phone and a palm device from the same charger with small usb hub as the splitter, or just charging a blackberry, 100mah may just take too long...
using alternate battery sources
By the way the article is awsome!
I like the setup. I would am planning to buy a couple of kits. But I was wondering about the battery source.
In full maker style I pulls laptop batteries apart and use the 16850 batteries and wonder if using those would work as well as using 3 cells for the added efficency more often?
Any idea of a low battery warning indicator or way of telling the batteries are just too low?
I like the setup. I would am planning to buy a couple of kits. But I was wondering about the battery source.
In full maker style I pulls laptop batteries apart and use the 16850 batteries and wonder if using those would work as well as using 3 cells for the added efficency more often?
Any idea of a low battery warning indicator or way of telling the batteries are just too low?
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- Joined: Thu Apr 06, 2006 4:21 pm
Re: using alternate battery sources
you want 3V for good efficiency, higher voltage is not necessarily more efficientweylan wrote:By the way the article is awsome!
I like the setup. I would am planning to buy a couple of kits. But I was wondering about the battery source.
In full maker style I pulls laptop batteries apart and use the 16850 batteries and wonder if using those would work as well as using 3 cells for the added efficency more often?
you can use D cells if you want, for more power
theres a LBI on the chip but its not default, check the schematic and the datasheet for info about how to set up the indicator
Any idea of a low battery warning indicator or way of telling the batteries are just too low?
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What are you willing to pay, the batteries are removable.
There are 2 available at $60.00 and $100.00 from dell.
A battery powered charger that puts out 5 volts at 2 amps running on 4 D Cells runs $160.00 premade (it comes as a kit and that is the only way it is sold)
I realize that all are more than $20.00 but 2 amp at 5 volts evidently is not cheap.
If i see anything cheaper i will post it.
There are 2 available at $60.00 and $100.00 from dell.
A battery powered charger that puts out 5 volts at 2 amps running on 4 D Cells runs $160.00 premade (it comes as a kit and that is the only way it is sold)
I realize that all are more than $20.00 but 2 amp at 5 volts evidently is not cheap.
If i see anything cheaper i will post it.
- leems425
- Posts: 2
- Joined: Thu Dec 22, 2011 1:41 am
Re: MintyBoost 1A ?
Can you redesign the mintyboost to run off lithium batteries instead of AA with 2 amp output ? That way you can use much higher capacity batteries and possibly integrate the solar charger too.
- nsayer
- Posts: 59
- Joined: Thu Aug 08, 2013 10:45 am
Re: MintyBoost 1A ?
I don't know if it's interesting, but I designed a 2A @ 5V *buck* converter as a Raspberry Pi power supply (Pi Power). You could adapt it (or its design) into a high powered USB power source. You'd need to power it from a *minimum* of 4 cells, since - as a buck converter - it needs a *higher* voltage to *reduce* down to 5V.
Please be positive and constructive with your questions and comments.