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alternative to ac charger?
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HG27
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12. December 2009 @ 01:43 |
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I got a canon powershot a590 is and was wondering if I could use a pc power supply to power it. Instead of using the official ac charger, the lowest output on the 300w power supply is 3.3v 20A which is .1 v higher than the rated 3.2v for the camera. I was reading that the voltage is what you really got to worry about and that a high current was ok.
I should probably bring the voltage down to the 3.2v right? Though wouldn't a current of 20A just fry a regular resistor?
I know the official chargers are not that much but I wanted to see if I could save some dough. ;)
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scum101
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14. December 2009 @ 01:38 |
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if you get the polarity wrong you will fry more than a resistor.. is the price of a new camera worth the saving a couple of quid that using an unsuitable psu will gain you?
how do you propose to start up the psu if it isn't attached to the rest of a computer? .. do you know the polarity of the camera socket?
and just a final point.. a pc psu 3v3 rail isn't the best regulated in the world.. I have seen them chuck out up to 9v offload.
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HG27
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14. December 2009 @ 20:52 |
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When you put it that way it does sound more logical to use the proper ac adapter. Though I was reading this guide over on instructables and thought it was pretty cool; considering I have a 300W power supply just laying around.
-ATX PS to Regular DC PS (for labs)
Found the proper ACK800 kit (not oem but same specs) for $12 each. I think I'll go that route in the end.
Though I bet the power supply could be used for basic circuit analysis and testing stuff.
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scum101
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14. December 2009 @ 21:46 |
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It can, the problem is starting them up without a mobo. Lots of modern psu's simply won't start unless they are connected to a working pc. If it was an old power up and run AT psu it would be a different matter. ;)
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HG27
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15. December 2009 @ 01:46 |
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Interesting the power supply is old I would say (not very old, but still) got it like 3-4 years ago.
It is an ISO switching power supply
Model No: ISO-400 4
Max output 300W(+12V,+5V&3.3V total)
Cause that guide I linked to said that by shorting the green wire to the black (ie gnd) that you could make the PS be controlled by the on/off switch in the back. Regardless of connection to actual PC.
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