Since it looks like you're basically buying the LadyAda kit [that circuit definitely looks like one of hers] and building it, I could see $30 being a decent price (as long as you're using the v3 of the kit) IF you're throwing in the batteries.
I can't see paying an extra $10 just for you building the kit though (sorry, but I know how easy it is to solder those).
Unless you can get those parts significantly cheaper than what LadyAda is selling her kits for, I don't see this being very profitable for you.
Newegg has the same basic thing in a (admittedly less cool looking case) for $20.
http://www.newegg.com/Product/Product.aspx?Item=N82E16875999294&Tpk=N82E16875999294
I've seen similar [not identical] items got for as low as $2 in the past: http://www.goldengadgets.com/emergency-aa-mobile-phone-charger.html
It's cool, but I'd like to see what TSA airport security would make of this.
First off, this is cool as hell.
Secondly, since the tin basically doesn't make any difference to performance, you could put it anything right ? Cigarette tin ? Old Gameboy ? Broken effects pedal ? Is it harder to add more batteries for extra capacity if you have the space ?
Finally, is entering the realms of crazy hard to add a 9v jack to this and make the whole unit rechargeable without replacing the batteries ?
Did anyone else see this and their brain connected straight to Steampunk Altoids Tin Etching ? Oh the possibilities Now I just need to make friends with someone who owns chemicals and won't end up dissolving me with them.
If you do go into making these, then I'd be interested as long as they'll let you ship them airmail. I can't see it being a problem, since you can ship most anything, but home made circuitry might be a problem for obvious reasons. Keep updating tho, is a cool project
First off, this is cool as hell.
Secondly, since the tin basically doesn't make any difference to performance, you could put it anything right ? Cigarette tin ? Old Gameboy ? Broken effects pedal ? Is it harder to add more batteries for extra capacity if you have the space ?
Finally, is entering the realms of crazy hard to add a 9v jack to this and make the whole unit rechargeable without replacing the batteries ?
Did anyone else see this and their brain connected straight to ? Oh the possibilities Now I just need to make friends with someone who owns chemicals and won't end up dissolving me with them.
If you do go into making these, then I'd be interested as long as they'll let you ship them airmail. I can't see it being a problem, since you can ship most anything, but home made circuitry might be a problem for obvious reasons. Keep updating tho, is a cool project
First let me say that the offer and tin is way cool! I would be one of those people who would take on the offer because i have no solder skills or intention to learn them at all.
But from a practical point of view wouldn't it be much cheaper and easier to carry two spare batteries for your device? I always carry a charged one with me (for htc desire).
i have a mini solar cell that fits perfectly over the top tin, how would I integrate that into the charger to charge the batteries only when im not using it?