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*HyperLight
*HyperLight

old hand
Location: Great Malvern [UK]
Member Since: 9th Dec 2003
Total posts: 1174
Posted:Hi everyone! My first thread here - yay! I got fed up of stinking of paraffin, so I've just started building some LED Poi and judging by the prototypes I built, they're going to be BRIGHT.

Per Head :
3 x AAA batteries
4 x Super Bright LEDs

Each head should be about 240mm long and 30mm round, giving off a bar of light 18mm by 30mm. At the moment, I'm running the LEDs at about twice what they're specc'ed for so I'm not sure how long they'll last - time will tell. The LEDs I have now are blue, but I've seen some green ones which are ~3x brighter!

Has anyone played around with PIC Microntrollers? They're what make the Aerotech staffs etc. work, and I'm thinking of modifying the POI I'm working on so that they can flash different colours / patterns and stuff...


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*HyperLight
*HyperLight

old hand
Location: Great Malvern [UK]
Member Since: 9th Dec 2003
Total posts: 1174
Posted:PWM is definitely the way forward - and what I plan to use. If you're just mixing them straight, that's definitely a contributing factor to the off-colours.

You should be able to produce a PWM signal with a cheap 555 timer which'll strobe fast enough that you can't tell when spinning.

One of the reasons I'd want to strobe is to get pretty patterns :

Non-Https Image Link


...but also to mix / balance the colours. Red LEDs / luxeons tend to be MUCH brighter than their blue counterparts, so I'll start by using PWM to dim the (red / green) colours down to the dimmest (blue). Once they're balanced, having them all on at once should give you white light. Then if you strobe them slower, you should be able to produce other colours as well smile It'll probably take a bit of work to get it looking right, but it's certainly possible (I hope)!


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Amanita
member
Location: Halifax, NS
Member Since: 22nd Mar 2004
Total posts: 157
Posted:Firegeek, I'd love to see a diagram of those LED poi- including the specs for the machined parts. That way, we could either get them made for ourselves, or know what to look for if we want ready made substitutes.
It might be worth saving up to have the peices made:)


"Do not meddle in the affairs of Tower Cranes, for you are soft and would look better when squashed by a full concrete bucket"

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*HyperLight
*HyperLight

old hand
Location: Great Malvern [UK]
Member Since: 9th Dec 2003
Total posts: 1174
Posted:I don't have time tonight, but when I'm back on Tuesday night, I'll do a big diagram o what I've got with dimensions all over.. watch this space smile

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*HyperLight
*HyperLight

old hand
Location: Great Malvern [UK]
Member Since: 9th Dec 2003
Total posts: 1174
Posted:Starting to make some progress on mark 2. Have a look at this thread to see where I'm headed smile

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nusku42
Member
Location: Chicago burbs
Member Since: 10th Jul 2005
Total posts: 19
Posted:Ok too much info for brain to take in. Does anybody know of a good link or have detailed instuctions for making your onw LED poi please keep em simple. I know hot stuff is bad and shocking yourself is bad too.

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XerxesDitto
XerxesDitto

member
Location: Battle, UK
Member Since: 11th Aug 2005
Total posts: 36
Posted:Hey all, I'm currently in the design stage of the "Ultra-Glow" LED poi.

I wish to use a "strobe effect", as you say. At the moment, I am thinking of using a 555 as an Astable and then running a 4017 off of it. The advantage is that I can use a bariable resistor to alter the strobe speed.

Initial designs can be found here:
http://www.homeofpoi.com/gallery/display.php?image=/500/6502initial_render.JPG
br>
At the moment, I am researching a variety of strobes. The idea is to run off around 6-8 Blue and 6-8 White per globe (High capacity batteries will be required) and alternate between the two.

If anyone has any suggestions, by all means, email me; Ziggy_Sheldrake@hotmail.com


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mattbassman
mattbassman

Southern Lights Whore
Location: Dorset
Member Since: 13th Oct 2003
Total posts: 51
Posted:Jon, please get in touch with me asap.
Cheers
Matt


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*HyperLight
*HyperLight

old hand
Location: Great Malvern [UK]
Member Since: 9th Dec 2003
Total posts: 1174
Posted:contact made - back from my holidays now smile

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