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[DPRG] "A great Arduino project for people who really like blinking LEDs."

Subject: [DPRG] "A great Arduino project for people who really like blinking LEDs."
From: Dale Wheat dale at dalewheat.com
Date: Wed Sep 30 19:09:46 CDT 2009

David,

No, the welding masks react to each flash of light, asynchronously.  They don't 
try to match any frequency.

Remember:  Always use your LEDs for good, never for evil.


Thanks,

Dale Wheat

(972) 486-1317
(877) DALE WHEAT
http://dalewheat.com


dpa wrote:
> So then we'd need frequency-hopping on the "weapon."  I feel an arms
> race coming' on...
> 
> dpa
> 
> 
> 
> Dale Wheat wrote:
>> Jeff,
>>
>> When a group of us took welding last January, we were told the element
>> darkens in a matter of microseconds in even the cheapest units
>> (~$50).  The higher-end units were rated in nanoseconds, which
>> everyone knows are too small to actually exist.
>>
>> So sure you could easily and inexpensively build a counter-weapon to
>> this 'bedazzler'.  The trick is to completely seal the optical path as
>> even reflections seem to have a detrimental physiological effect.
>>
>>
>> Thanks,
>>
>> Dale Wheat
>>
>> (972) 486-1317
>> (877) DALE WHEAT
>> http://dalewheat.com
>>
>>
>> Jeff Koenig wrote:
>>> Interesting link!
>>>
>>> I suddenly have an urge to modify one of those electronically
>>> controlled, self darkening welder's masks with a front-mounted
>>> photodiode sensor.
>>>
>>> If the optical element on the mask transitions quickly enough, I bet
>>> it wouldn't be hard to rig up something that would autoblank an
>>> offending 8-10 Hz bright light.
>>>
>>> Of course, I'd open source it, too.
>>>
>>> -Jeff
>>>
>>>
>>>
>>>
>>>
>>> On Tue, Sep 29, 2009 at 5:21 PM, dpa <dpa at mail.isem.smu.edu
>>> <mailto:dpa at mail.isem.smu.edu>> wrote:
>>>
>>>
>>>     http://ladyada.net/make/bedazzler/
>>>
>>>
>>>     Dale?
>>>
>>>     cheers!
>>>     dpa
>>>
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