How-To: Binary clock using a Freeduino SB 2.1


Solarbotics recently released its own version of the Arduino microcontroller development board. They based their board on the Freeduino design. We thought this would be a good opportunity to review the new board as well as present a How-To about building a simple binary clock. Along the way we’ll cover some basics on attaching LEDs and switches to a microcontroller.

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AVR Laser Projector


I’ve seen a few simple DIY laser projectors that just oscillate the beam. This one (scroll past the pong game) has 16 lines of resolution. Sixteen mirrors are rotated by a motor, and an AVR controller pulses the laser to draw the image. Via Asish’s Programming Journal (Worth checking out, he’s been doing several webcam laser pointer projects.)