View Single Post
  #30   Report Post  
Posted to rec.crafts.metalworking
DoN. Nichols[_2_] DoN. Nichols[_2_] is offline
external usenet poster
 
Posts: 2,584
Default How do welding shade numbers add up? Eclipse viewing.

On 2012-05-24, Edward A. Falk wrote:
In article ,
Leon Fisk wrote:

Just something to try...

What if you point it at the Sun and then use something like a sparker
(torch lighter, Bic lighter) to trigger it to go dark. Will it stay dark
then, maybe?


Actually, simply waving my hand in front the the sensor was enough to get
it to trigger, but as soon as you stop waving, it goes transparent again.

Tried to think of some flickering light source I could use that I would
trust my vision to, and decided it wasn't a good idea.


Stick a small electric motor and a propeller on the front of the
hood so the propeller interrupts the light to the sensor.

Enjoy,
DoN.

--
Remove oil spill source from e-mail
Email: | Voice (all times): (703) 938-4564
(too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html
--- Black Holes are where God is dividing by zero ---