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Oldest comments listed first.

• I thought a LED clock with 3" digits was big.

  Wow. I now have an overwhelming urge to build a slightly smaller model.

  Posted by: mrbill on March 19, 2006 at 9:41 PM

• It's a 12 foot clock, not 21', isn't it?

  Posted by: yo_tyler on March 19, 2006 at 10:07 PM

• My eyes! The goggles, they do nothing! :D

  Posted by: pelrun on March 20, 2006 at 1:54 AM

• A couple of suggestions.
  1. Use PWM to control the brightness.
  2. Use an optical sensor or one of the leds to sense the light levels and have the clock auto adjust the brightness.
  3. Make it more modular. Use a pic chip per module and daisy chain them.
  

  Posted by: lwatcdr on March 20, 2006 at 12:12 PM

• Now if I directed "lost" this is the countdown clock I would use. Can you imagine the overhead lights going down and having this clock countdown as the only light in the room.

  Nice work, I give you bonus points for the gps accuracy.
  

  Posted by: PhilAndrews on March 20, 2006 at 2:27 PM

• Don't use a rotozip. Use a hot wire cutter. Much cleaner. Do a google search and you'll even find plans to make your own.

  -b

  Posted by: bvanhiel on March 20, 2006 at 5:31 PM

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