28 Sep '13, 2pm

CD-ROM POV Clock

CD-ROM POV Clock

[Kyle] wanted to try something new. A Persistence of Vision Clock using a CD-ROM drive . We have covered lots of POV Clocks that make use of hard drives , but we think this is the first time we have seen a CD-ROM drive used instead. [Kyle] points out that CD-ROM drives are typically much quieter than hard drives, which is the main reason he chose the CD-ROM route. At the heart of this project is a good old ATMEGA168 and an RGB LED strip for the lights. To measure and maintain the rotational speed of the clock [Kyle] used an IR photodiode that detects a reference mark on the disc. An elegant build of a classic POV Clock, with a new twist! The cool thing about this project is he did not actually use the CD-ROM drive like you think he would — he chucked the spindle motor and instead is spinning the disk using the tray ejection motor! He did this so he could control the motor ...

Full article: http://hackaday.com/2013/09/28/cd-rom-pov-clock/

Tweets

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