If you're looking for clever ways to repurpose any of the old CD or DVD players that might be scattered around your house, we ...

Posted in clock hacks, Laser Hacks Tagged cutter, diode, dvd, engraver, laser ← Tracking Ships Using Software-defined Radio (SDR) Fabricating A Mechanical Wristwatch At Home → ...

Last Updated: 7/27/18 Teaching Standard: In this fun project an ultrasonic distance sensor is used to detect a “target” (i.e., a person, a cat, a burglar, etc.). The Arduino illuminates (blasts) the ...

If you’d like to build one, the bill of materials and Arduino code are listed on the above site. We’ve features some other interesting laser-based instruments in the past, such as this guitar ...