I think this switching regulator may solve the problem of charging IPhone/Ipod touch that require more than 500 mA
http://www.dimensionengineering.com/DE-SWADJ.htm
(also available at http://www.all-battery.com)
It's very small and there is no need of external capacitors or resistors.
It can fit the altoids gum tin can, and the price is only $15 plus shipping.
High power (1A) switching voltage regulator
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i think you mean this
http://www.dimensionengineering.com/lvboost.htm
http://www.dimensionengineering.com/lvboost.htm
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One more thing:
For people who do not want to solder, this site also sell an adaptor to connect wires from battery:
http://www.dimensionengineering.com/VregBreakout.htm
For people who do not want to solder, this site also sell an adaptor to connect wires from battery:
http://www.dimensionengineering.com/VregBreakout.htm
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Keep in mind that at some point, the internal resistance of 2 AA batteries will mean that you won't get any benefit out of a regulator that has higher output current capability.
Using 4 AAs in a 2-series,2-parallel configuration might work much better, or 3 AA NiMHs in series.
Cs and Ds might not provide that much benefit for alkalines - I've heard that their internal resistance isn't actually that much lower than AAs. (Hence the comment about 4 AAs in 2s2p configuration instead.)
Using 4 AAs in a 2-series,2-parallel configuration might work much better, or 3 AA NiMHs in series.
Cs and Ds might not provide that much benefit for alkalines - I've heard that their internal resistance isn't actually that much lower than AAs. (Hence the comment about 4 AAs in 2s2p configuration instead.)
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Looks like we are going to the full size Altoids box
I've seen someone on this forum use 4 AA in parallel in his box.
This regulator.. how efficient is it? Does it have a high operational current draw?
I've seen someone on this forum use 4 AA in parallel in his box.
This regulator.. how efficient is it? Does it have a high operational current draw?
Entropy wrote:Keep in mind that at some point, the internal resistance of 2 AA batteries will mean that you won't get any benefit out of a regulator that has higher output current capability.
Using 4 AAs in a 2-series,2-parallel configuration might work much better, or 3 AA NiMHs in series.
Cs and Ds might not provide that much benefit for alkalines - I've heard that their internal resistance isn't actually that much lower than AAs. (Hence the comment about 4 AAs in 2s2p configuration instead.)
Please be positive and constructive with your questions and comments.