[Lab] AC adapter question

Ken klmckinnon at rogers.com
Thu Jul 11 19:00:57 EDT 2013

It should power a LOT of LED's.  How many were you using and what sort 
of current limiting resistor did you have....a quick circuit diagram 
would tell a lot.


On 7/11/2013 6:49 PM, Britta Evans-Fenton wrote:
> A little question about AC adapters.
> I have an artwork that I did that I used an AC adapter to get power. 
>  It was on for 4 days during a show, and I was surprised on how hot it 
> got.  (I almost burned myself).  I did have duct tape on it holding it 
> to the back of a wall, so that may have been half the problem.
> I'm showing the work again, but I'm wanting to make sure everything is 
> safe.  I need to hide the adapter due to aesthetic reasons, so I 
> wanted to create a little white box around it with air holes, and I 
> was suggested a fan, although it if it getting hot due to over 
> working, adding another fan might not be a good idea.
> It is only a bunch of IR leds that it is powering, so I'm surprised at 
> the power I am needing.
> any help would be very well appreciated.
>>> Here is the Adapter I used :
>>> http://www.digikey.ca/product-detail/en/VGS-25-5/102-1928-ND/2045659
>>> Here are the IR LEDS:
>>> http://www.digikey.ca/product-detail/en/QED233/QED233-ND/187410
>>> And the Resistors I have on them were 91 OHM 1/4W 5% CARBON FILM.
> Britta
> /Technical Coordinator /
> Artengine.ca
> Ottawa Mini Maker Faire
> Aug. 31 & Sept. 1 2013
> www.makerfaireottawa.com <http://www.makerfaireottawa.com>
> @MakerFaireOTT
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