Technology

Light-up sidewalk brick

Light-up sidewalk brick

This weekend while walking down Mill Avenue in Tempe, AZ, I saw an interesting sight. The sidewalk is made of bricks, but one of them was glowing. Upon closer inspection, it appeared one brick had been removed and replaced with an acrylic box containing a light source, which was backlighting a drawing on the inside […]

Graphite sequencer

Graphite sequencer

Here’s an interesting project by Caleb Coppock: Graphite conducts electricity. Two wires brush against the surface of a paper disk as it spins. The wires are connected to a simple electronic tone generator. When a line of graphite is drawn across the disk, connecting two wires, a tone is heard. The quality of the line […]