[Lab] AC adapter question

[Britta Evans-Fenton]

There are 188 IR leds:
http://www.digikey.ca/product-detail/en/QED233/QED233-ND/187410  All
connected in parallel each with their own Resistor ( 91 OHM 1/4W 5% CARBON
FILM)

Britta
*Technical Coordinator *
Artengine.ca

Ottawa Mini Maker Faire
Aug. 31 & Sept. 1 2013
www.makerfaireottawa.com
@MakerFaireOTT
#MMFO


On Thu, Jul 11, 2013 at 4:00 PM, Ken <klmckinnon at rogers.com> wrote:

>  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.
>
> Ken
>
>
> 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
> @MakerFaireOTT
> #MMFO
>
>
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