Olivier van Herpt invented a machine called the Time Writer. It allows any graffiti artist in training to get their message out to the masses with the push of a button. An Arduino controls the action here. The Arduino pulses a number of relays which open and close paint nozzles. The paint mixture is pressurized using a re-purposed water fire extinguisher which conveniently has a valve just like a
Tobias Schmidt built a robot mechanism to time his tea brewing. It uses a Atmel ATmega8 microcontroller to run the show, a 2 line LCD display shows you how much time is left for the brew to complete. A motorized slide was made with two optical limit switches is used to dunk the tea bag into the cup. Tobias is willing to share the code with anyone that is
 NAND Gates are very versatile. You might remember back in the TTL days when you were out of a specific chip you could always grab a NAND chip out of the bin and re-purpose it to work. This NANDputer looks like it would be a bit harder to troubleshoot than the one that I am using to write this on! “While the CPU architecture is fairly conventional, the
Thanks to Jerod Michel for sending in the details of this Armed Mobile Response RC Car that he and his students have built. It can be driven around remotely, it has an audio and video range of 100 meters. If you spot something you aren’t pleased with you can paint your target with the laser and fire the vehicle mounted gun. I have to admit, it is quite strange to
Kerimil sent in a method that he is using to get data out of his Arduino projects to the net using an Android phone in the middle. He demonstrates how he wrote the program on the Android using MIT App Inventor. The initial GUI reminds me of the Visual Studio environment where you can drag and drop elements such as check boxes and buttons but the language looks very
If you have a Baofeng UV5R Ham Radio and want to get the most out of it have a look at the reverse engineering work Lior Elazary has done with his. The radio is very powerful as it is but when hacked, the sky is the limit on what you can do with it. Lior has many pages of information and code that he has used to hack this
  These RGB Pixels look like they are fun to work with since they are so versatile. Tobias Floery is having some fun building an RGB Pixel Clock using a string of them. You can see the 3 parts of the project linked to below. Tobias is using a real time clock connected to an Arduino to keep accurate time, he found a good library for controlling the LED
