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Old 2nd August 2013, 12:36 AM   #1
lgreen is offline lgreen  United States
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Default How to do "Ceiling" LEDs?

My alarm clock shows the time on my ceiling using some kind of laser or LED.

How do I get my DIY amp to project a VU meter up there? Any parts to try?
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Old 2nd August 2013, 01:20 AM   #2
zane is offline zane  Australia
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Hi,
The Instructables web page has one How to build a clock that projects time on the wall
You might get some ideas from this
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Old 3rd August 2013, 09:50 AM   #3
dangus is offline dangus  Canada
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There are LED optics (internal reflectors) made for the 1W/3W star-mounted LEDS. I've considered putting a row of 1W stars on a curved mount and letting them project on the wall or ceiling. The 1W stars are pretty cheap if you buy them on eBay. Or, you could just use magnifying glasses (convex lenses). They'd be trickier to mount, but should give a tighter focus; the LED optics are intended for lighting applications, so they tend to give wide, uniform beams, not a tight spot.

Last edited by dangus; 3rd August 2013 at 09:59 AM.
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