Flutterby™! : Projection clock: cheap

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Projection clock: cheap

2006-02-02 16:41:32.259603+00 by Dan Lyke 2 comments

Last weekend we went to a local school fundraiser: Bingo night. I felt 70 years old and Catholic, but we had a lot of fun. One of the issues, however, is that a room full of kids is loud, and I started daydreaming about cheap ways to build a large display to put the numbers up high, rather than just being written on a low and easily obscured white board after they were called.

Mark V had a link to a note on using a cheap digital watch to build a projection clock. Not an immediate solution, for one thing the main problem with projection systems is building a cool light source that's bright enough to make a difference, but one which has me thinking...

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comments in ascending chronological order (reverse):

#Comment Re: made: 2006-02-02 22:34:36.201268+00 by: mvandewettering

You could put 100 15,000 millicandela leds together for about $28.00.


Shine these through a simple mask and then through projection optics, and you would probably get pretty good results. Total current, roughly 2 amps, which seems doable.

#Comment Re: made: 2006-02-02 22:35:23.820793+00 by: mvandewettering


also would seem to be relevent...