There are tons of well documented projects about controlling a normal lcd display, but people want more and more. PyroElectro has this cool project based on ATmega microcontroller and a nokia 6100 display. Until now the project was only developed to display a colored square on the LCD, but the possibilities are endless, it just needs someone to develop the code a little more.
AVR controlled color lcd display: [Link]
Any USB port can supply 5V at up to 500mA. The USB standard specifies that a device may not use more than 100mA until it has negotiated the right to use 500mA, but apparently no USB ports enforce that requirement. This makes the USB port a convenient source of power for devices such as this charger.
USB AA NiMH and NiCd Battery Charger: [Link]
This project consist of an 8×8 LED grid controlled by the Arduino. The result is a particle effect, a particle that bounces around the LED matrix. But the arduino only has 13 outputs, so you can only control 13 LEDs? Well, the author discovered that trough Charlieplexing which is a complicated mode of wiring LED’s you can actually drive more LED’s with fewer outputs.
Arduino LED particle system: [Link]
the author writes: Radio Shack Special…the name was given to it because all of the components may be purchased at your local or nearby hardware and Radio Shack store. Although Radio Shack does not carry a typical 6 lead AM/FM variable (tuning) capacitor for tuning in to all the FM stations, I have managed to come up with a simple little way of going from station to station by just stretching and sqeezing the DRAIN coil with some sort of non-metallic small stick; such as a tapered-wooden match-stick.
If you would prefer to use a variable (tuning) capacitor, you can always find these devices from any AM/FM tunable (not digital) radio or check to see if your local Wal-Mart carries a small blue portable AM/FM radio by ‘Lenoxx Sound’, which sells for around five dollars. From that radio, you can the salvage the variable (tuning) capacitor (with the plastic knob included), the headphones (in which I use for the Radio Shack Special) and the audio jack (also what I use for the project). A good buy for $5. The finished PCB in this project is adapted to either use a variable capacitor or not.
One transistor super-regenerative FM receiver: [Link]
The Sandwhich robot is a cool little robo(line follower robot) that is made from easy to find parts , not to mention cheap, and stuffed together into a plastic sandwich box.
Sandwich Robot (line follower robot): [Link]
