[Lab] AC adapter question

[Michael Grant]

Your resistors will get a little warm but it's not the end of the world...
If you can, just split off half the LEDs and get another supply of equal or
better...

Michael

On Thu, Jul 11, 2013 at 7:59 PM, Britta Evans-Fenton <technical at artengine.ca
> wrote:

> I'll check it out tonight or tomorrow morning, when I'm with my artwork
> again to be sure, but I think it might be even more than the 9 amps Michael
> suggests.
>
> How important do you think the other resistors would be. It would be a
> huge undertaking to re-do this piece.
>
> Here is the work here:
> http://brittaevansfenton.com/System_Failure.html
>
> 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 4:49 PM, Darcy Whyte <darcy at siteware.com> wrote:
>
>> Why don't you check how many amps you are using?
>>
>>
>>
>> --
>> Darcy Whyte
>> Twitter: https://twitter.com/inventor_Artist
>>
>> Art+ inventorArtist.com | Aviation rubber-power.com | Software Since '88
>> siteware.com | Contact: darcy at siteware.com | 613-563-3634 by appointment
>> | Canada N 45° 25'03.1" W 75° 42'21.4"
>>
>>
>>
>>
>> On Thu, Jul 11, 2013 at 7:41 PM, Britta Evans-Fenton <
>> technical at artengine.ca> wrote:
>>
>>> Maybe I'm drawing too much Amps.  Would you recommend this AC converter
>>> over the last one:
>>> http://www.digikey.ca/product-detail/en/LS150-5/285-1817-ND/1918828
>>>
>>> I would have Amps to spare on this one.
>>>
>>> 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 4:32 PM, Britta Evans-Fenton <
>>> technical at artengine.ca> wrote:
>>>
>>>> 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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>>>>
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