[Swansea Hackspace] LED diffuser

[Ceri Clatworthy]

http://www.banggood.com/5W-Round-COB-LED-Bead-Chips-For-Down-Light-Ceiling-Lamp-DC-15-17V-p-919789.html

On Sun, Nov 16, 2014 at 6:12 PM, Tim Moore <timmoore47 at gmail.com> wrote:

> Off Topic
>
> I'm try to get some 12v 10W cob white light led chips but all I can find
> is the round ones from RS.   Anybody know of a source for the square ones ?
>
> :  )
>
> Tim_1
>
> On 10 November 2014 15:35, Graham Owens <grahamowensuk at googlemail.com>
> wrote:
>
>> Hi Jon,  thanks for that, just done some searching, and it seems to be a
>> hotly debated topic which is best for table tennis, almost as bad as the
>> pic/avr debate lol.
>>
>> I have found a couple of 'club' balls (plastic) as opposed to 'match'
>> balls (cellulose)- i will do some *destructive testing* ;) tomorrow night
>> to see how prone they are to catch on fire.
>>
>> I have to admit, i love how uniform the light is from them :)
>>
>> Will add some pictures to the site.
>>
>> Best Regards
>>
>> Graham
>>
>> On 10 Nov 2014, at 10:15, jon lilley <jon.j.lilley at gmail.com> wrote:
>>
>> You could use "practice" ping-pong balls.
>> 10 for 99p from China, and they're not made of celluloid, so they're not
>> prone to bursting into flame. :)
>>
>> J
>> On 9 Nov 2014 22:16, "Graham Owens" <grahamowensuk at googlemail.com> wrote:
>>
>>> Gah, the ping pong's give exactly the look I wanted but I don't want to
>>> cause a fire hazard, and the triangles look really cool, are safe but are
>>> pretty hard to make. (in comparison to sticking a pingpong over an led)
>>>
>>> Think I will have to keep looking.
>>> ------------------------------
>>> From: Gerrit Niezen <gerrit.niezen at gmail.com>
>>> Sent: ‎09/‎11/‎2014 21:37
>>> To: Swansea Hackspace <hackspace at swansea.hackspace.org.uk>
>>> Subject: Re: [Swansea Hackspace] LED diffuser
>>>
>>> This LED triangle creates a beautiful even diffusion using acrylic and a
>>> painted cavity:
>>> http://www.instructables.com/id/Making-a-great-LED-triangle/ (laser
>>> cutter required)
>>>
>>> With regards to ping pong balls - keep in mind that they’re very
>>> flammable:
>>>
>>> http://dangerousprototypes.com/2012/06/08/warning-ping-pong-balls-are-very-flammable/
>>>
>>>
>>> On 9 Nov 2014, at 20:18, Graham Owens <grahamowensuk at googlemail.com>
>>> wrote:
>>>
>>> It was me,
>>>
>>> and i have to say they look pretty awesome, very much what i was looking
>>> for.
>>>
>>> Today i have mostly been doing a teach the wife arduino day, and we have
>>> come up the a colour changing, temperature sensing pteranodon that flaps
>>> its wings when it detects motion.
>>>
>>> pictures and a video to follow :)
>>>
>>> On 9 November 2014 20:06, Justin Mitchell <justin at discordia.org.uk>
>>> wrote:
>>>
>>>> Someone was asking about good diffusers for an LED the other day?
>>>>
>>>> Just seen this article using ping pong balls, looks pretty good.
>>>>
>>>> https://plus.google.com/u/0/101411395547219906775/posts/fJvzXwBzi4m
>>>>
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>>>
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>
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