Megavolts.nl built a speed meter that can monitor the speed of his coil gun bullets. The bullet trips an entry beam and an exit beam which are at a known distance apart, this allows the speed of the bullet to be calculated and displayed. The build is detailed and includes code and schematics. Here is a Google English translation. Big thanks to the creator for translating the project to English!
Ebay is a great place to look for some vintage tech. Have a look at this CD duplicating robot that TINYenormous got for only $11. Instead of ripping out and replacing the control electronics he lucked out and found someone who had details on converting it to serial control. Thanks Ross. "I bought it intending to put an arduino in the place of the control board and probably have
If you use your laptop in public places LAlarm is a piece of free product that could help you (small fee for corporate use). This system is basically an alarm for your laptop, best of all it is packed with tons of cool features like sending an SMS message to you or destroying your sensitive data if it is stolen. "The following procedure locks down a laptop to a
Have a look at the TinyProjector Lab Notebook project for some cool laser projection prototyping. See two of the ten prototypes below. Via: Elektronika "The biggest challenge for designers of mobile communication devices is presenting large amounts of information on very small displays. As the form factor of these devices continues to get smaller and our demand for mobile information continues to grow, the task only gets more difficult.
