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Old 10-22-2007, 07:24 PM #17
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Default Re: help for on diode

Toked,
I still agree with The Great Gazoo, check your focus first. If you want to burn up close (like 6 inches) then the spot on the wall across the room should be several feet across.
Next, does the beam look nice and bright?
If it's not very bright, like less than a $1 pointer, then I think you killed it by running without a proper driver and cooking the poor little facets.

Edit because I'm too slow

Gazoo, you beat me to it.


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Old 10-22-2007, 07:44 PM #18
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Default Re: help for on diode

its very bright and i see the beam and i am using fresh alkalines
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Old 10-22-2007, 07:51 PM #19
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Default Re: help for on diode

Can you unscrew the lens a few turns?
What size is the spot 10 feet away?
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Old 10-22-2007, 07:53 PM #20
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Default Re: help for on diode

very tiny but very bright 8-)
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Old 10-22-2007, 07:59 PM #21
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Default Re: help for on diode

Try opening the focus up a bit to burn up close.
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Old 10-22-2007, 08:30 PM #22
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Default Re: help for on diode

i did that already it just wont burn
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Old 10-22-2007, 09:00 PM #23
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Default Re: help for on diode

Am I right in thinking that you opened up the aperture at the back of the lens holder? ...if that wasn't you it would be worth doing it, if you have done it can you get a small dot 3 or 4 inches from the lens? At that distance it should burn easily.

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Old 10-22-2007, 10:29 PM #24
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Default Re: help for on diode

i did but maybe not enough
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Old 10-23-2007, 12:07 AM #25
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Default Re: help for on diode

Try dropping the resistor down to ~2 ohms and see what happens.
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Old 10-23-2007, 01:26 AM #26
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Default Re: help for on diode

i dropped it to 1.5 ohms and it doesnt burn im doomed could it i have a bad focus lens
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