Technology

chalk-writer

The ChalkJET Writing Machine

“Way back” in 2009, students in the UC Berkley “ME 102” class came up with this excellent automatic chalk-spraying machine. It uses 8 cans of spray-chalk to spray the message of your choosing onto the sidewalk or street as you push it along. This device is controlled by two Arduino Duemilanove boards, which apparently base […]

dashboard

A Custom Bicycle Dashboard

If you’re not satisfied with the lightweight digital speedometer that you can buy at your local bike shop, why not build your own bicycle dashboard using various electrical components and wood? DJ decided to do just that, and gives instructions with an electrical schematic, parts list, and Arduino sketch, in this Instructables post. Besides the […]