COLOR CHANGING PROJECTION CLOCK
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I need to measure the projection of the "seconds" hand (on a clock) on the horizontal axis as it goes around. Problem is that I don’t have a clue how to do that – I’m unfamiliar with the term "projection" in math since I never took geo- or trigonometry.
I think they mean like imagine there is an axis going horizontally through the center of the clock going through 9 and 3. Now the center of the clock would be 0. So when the second hand is on 12 or 6 the projection to the horizontal line would be 0. And assuming you label the axis from -1 (9) to 1 (3) then when the second hand is on 3 the projection is 1 and when its on 9 the projection is -1. So .5 would be around 5-7 seconds at the top and at 23-25 seconds at the bottom.
http://www.dealperfect.com/detail.dp/sku.21648
Time function with 12am/pm 24 hours display format
Alarm and hourly chime function
4 soothing nature sound (bird,chirp,brook,sea-shore and windchimes)
Changing color light and be full of fun
LED projector clock upto 2.5 meters display
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I have the blue Discovery Channel projection/atomic clock, and I’ve lost the book, and my mother took the batteries out. Can anyone tell me how to get it hooked back up to the satellite so I don’t have to guess what time it is?
Hi, you put the batteries back in and in a few hours it will set the time correctly. It doesn’t use a satellite–just a local radio station, but it can take several hours to actually work. If the unit doesn’t reset its time within one day put it next to a window and it should reset itself properly. Putting it next to a window allows the unit to receive the radio signal a lot better.
180 degree rotating head on top which projects time, date, temperature in dark or dim room.
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Here’s one: http://www.ambientweather.com/rrorscatpral.html
and another: http://www.overstock.com/sm-sdat-180-degree-projection-digital-am-fm-alarm-clock-radio–pg-proframe_pi-1546466_ti-82124.html
Hope this helps.
-Neil
The two clocks in this video have been around for as long as I can remember, and then they kind of disappeared. I found both of them recently, sitting in the darkness of my grandfather’s seldom-used workshop in his basement.
I’d love to know approximately how old they are. They can’t be all that old, but I know they were around when I was very young–so I’d guess they are from sometime in the 1980s.
These clocks use a simple flashlight bulb for their projection, and run it at lower than its rated voltage to prolong bulb life and reduce heat output, which is important considering that the entire projection unit is plastic like the rest of the clock.
Both projection bulbs were burned out, both clocks had loose power plugs on them and corroded battery terminals. The more used looking of the two clocks actually had developed an internal short as the litz wire going to the power plug and battery areas had been twisted around and around until it shorted things out.
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It plays my iPod, radio, and nature songs. It also projects the time on the ceiling.
Can I leave the time projector one all the time? Is there a lightbulb somewhere that will burn out? I don’t want to break it!!
Thanks,
Yes, my projector has been running since last year!
I’ve been trying to set up the projection part of my iLive clock and it’s still not coming along all that great. I’ve set up my clock perfectly fine, but my projector keeps saying 8:88. And it doesn’t say anything in the manual about this. Can someone please help?
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