In this project Steve Hoefer uses some electronics to create some fun chattering teeth that will give you some fun incentive to keep brushing your teeth for long enough to maximize effectiveness. A small microswitch waits for you to remove your toothbrush and the 555 timer goes to work counting down your 2 minute brush time. A servo motor that has been hacked to operate in continuous rotation mode
 If you hate when you don’t have a partner to play ping pong with you why not build a robot. Ulf Hoffmann is an industrial mechanic and has some creative ideas. His Ping Pong Robot (translated) is quite amazing, you can see it in action above. The videos below demonstrate the building blocks to get to where the robot is today. Via: Laughing Squid
  Many laser machines have very crude table positioning for Z control. Martin Raynsford wanted to add some additional Z table control to his laser machine. An Arduino and some buttons are used to interface with the system to allow for some enhanced table height adjustment. “The user pad has 4 buttons, one fast and one slow in either direction. If you push fast and slow at the same
With a used printer and a handful of inexpensive parts you can make your own old school plotter. I remember when plotters were all the rage, if you had a high end one it could even handle multiple colored pens and change them automatically. If you are interested in creating some technology of the past the Junk Plus Arduino blog demonstrates how to make your own. ” Junk (the
   There are lots of simply boxes to test servo motors but there is a bit of a void when it comes to stepper motor testers. Kenneth Weiss has built the Easy Stepper Motor Controller to fill the need. By plugging in some power and the stepper, you will be able to start testing in seconds instead of writing some sample code, building up a driver circuit etc. When
With high output LEDs falling in price it might finally be the time to add them into some inexpensive projects. Julian Ilett made a holder using a chunk of wood where a few power tool batteries can slide into. The LED is bolted to some metal which will allow it to run for some time but not long durations since the LED module does generate quite a bit of
Fabrizio Giordano used some items in his kitchen to allow him to remotely unlock his apartment door. When you are in an apartment you will quickly eat up your damage deposit if you start drilling holes for wires and screw things to the walls and doors. With a bit of tape and some wires hanging in some creative ways Fabrizio was able to mount his unlocking mechanism so that
