External Power for S100 - page 2 - Hotwire! Hardware Mods, Accessories and Insights - CHDK Forum
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External Power for S100

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Offline ahull

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Re: External Power for S100
« Reply #10 on: 06 / January / 2014, 14:22:15 »
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Quote from: waterwingz on 06 / January / 2014, 12:10:47
Quote from: ahull on 06 / January / 2014, 11:32:20
here is a sequence of pictures (from this post) showing the regulator I used.
Powershot ixus850?  Cool - we need your help here :   http://chdk.setepontos.com/index.php?topic=11078

We need a report on the S100 too  ;)

TIA !

You'll be wanting the results from the Ixus Wireless (SD430) and the A3000 too I presume... let me see what I can do tomorrow.
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Offline drillthrall

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Re: External Power for S100
« Reply #11 on: 06 / January / 2014, 15:58:45 »
OK, those pics should do it for me.  Thanks for those, ahull.  I had two other regulators on my Amazon wishlist.  Here they are:

http://www.amazon.com/dp/B00E4FZINQ/ref=wl_it_dp_o_pC_nS_ttl?_encoding=UTF8&colid=25FWVOAWTKPPN&coliid=I1J4MXI2ZZ3JMF

http://www.amazon.com/dp/B00FPG3EUC/ref=wl_it_dp_o_pC_nS_ttl?_encoding=UTF8&colid=25FWVOAWTKPPN&coliid=I2A19WAP60LAN0

Does it matter if I take the power from the 12v or 5v part of the li-on pack as far as length of charge to the S100 goes?



« Last Edit: 06 / January / 2014, 16:01:50 by drillthrall »
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Offline drillthrall

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Re: External Power for S100
« Reply #12 on: 06 / January / 2014, 16:02:33 »
I have my parts on order.  When I get it all together I will post the pics here in this forum.  It's only thanks to you fellows and your kind support.
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Offline drillthrall

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Re: External Power for S100
« Reply #13 on: 06 / January / 2014, 18:28:36 »
Any chance I could get a part number for the right angle plug that would go to my S100?  Or is it just too specific to recommend a part?  I know that I can cannibalize the one that comes with the ack-dc30 but I like the one you used.

Also, is it correct to assume that you just took a regular 3' USB cable and cut an end off?
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Offline ahull

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Re: External Power for S100
« Reply #14 on: 07 / January / 2014, 03:01:18 »
Quote from: drillthrall on 06 / January / 2014, 18:28:36
Any chance I could get a part number for the right angle plug that would go to my S100?  Or is it just too specific to recommend a part?  I know that I can cannibalize the one that comes with the ack-dc30 but I like the one you used.

Also, is it correct to assume that you just took a regular 3' USB cable and cut an end off?

Not quite correct, I had a bunch of tips in my junk box from various multi-purpose adapters (the sort that have lots of tips, and you can vary the voltage on). I used one of those..

... as I said in my previous post...
Quote from: ahull on 13 / August / 2013, 16:58:27
I didn't have the correct connector in my junk box, but I had lots of multipurpose adapter tips, so I simply soldered a couple of wires to one of those and added a bit of heat-shrink tubing and a ballpoint pen cap to turn it into a fairly convincing right angle connector. I could of course have snipped the lead from the PSU, since I am not very likely to actually use it, but it wasn't right angled, so it would have taken up more space in the weatherproof box.

... something like the set of tips pictured here. If you look around on ebay, there are lots of these sorts of adaptors.
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Offline drillthrall

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Re: External Power for S100
« Reply #15 on: 07 / January / 2014, 15:57:10 »
Once again, thanks.

I'll order some of those barrel tips as I'll probably do something wrong during this build and end up needing a few spares. :-[
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Offline drillthrall

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Re: External Power for S100
« Reply #16 on: 07 / January / 2014, 16:50:17 »
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Offline drillthrall

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Re: External Power for S100
« Reply #17 on: 14 / January / 2014, 01:11:31 »
Is there a special tool that I should be using to turn the voltage screw on the Buck Converter pictured here?  I didn't dare use a small metal screwdriver when it was powered up so I used a piece of plastic. 

So far I've successfully attached it to both a 12v source and a 5V source and gotten both down to 3.7v so I guess I'm on the right track to externally powering my ELPH 300, S100 and new S110 as they are all 3.7v.  I'm waiting on some more converters, li-po packs and some straight and angled adapter tips.
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Offline ahull

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Re: External Power for S100
« Reply #18 on: 14 / January / 2014, 04:25:36 »
A metal screwdriver will be fine, so long as you dont inadvertently short anything out on the circuit board with it, there are no hazardous voltages (but shorting things out might kill the regulator). The screw is isolated from anything electrical. There is a good description of their construction here.



As you can see, the screw rotates a nylon half gear arrangement, that in turn moves the wiper on the potentiometer. All entirely electrically isolated. If you are still a little paranoid, you could also use a plastic trimmer tool (used for adjusting the high voltage sections of switch mode PSUs and TV CRT flyback circuits, so good for a few tens of kV), something like  this or even a mains tester screwdriver.
« Last Edit: 14 / January / 2014, 04:50:46 by ahull »
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Offline drillthrall

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Re: External Power for S100
« Reply #19 on: 14 / January / 2014, 14:48:33 »
Once again, thanks for the reply, thanks for the great info. :)  Small metal screwdriver it is, but carefully.
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