So you want to get mobile with your Arduino or other micro controller and don’t know where to start? The Maker Shed has you covered with the 4WD Arduino Compatible Mobile Platform. This kit features 4 geared motors, wheels, and a high-strength aluminum alloy body. Just add an Arduino, power supply, and motor shield. Your project will soon traverse grass, gravel, sand, or sloped surface with ease. Also available in 2WD.
When working on 20×4 (or bigger) lcds font dimension can become an interesting issue: [liudr] shared & updated its Phi_Big_Font library
The Phi_big_font library utilizes 3 X 5 dot matrix technique I developed to display characters 6 times the size of ordinary characters seen on HD44780-compatible character LCDs. You will need two rows and 4 columns to display one character (with one column blank to separate characters). A 16*2 display can display 4 such characters, making a perfect clock display like HH:MM, or month or day display in three characters. A 20*4 display can display 5 characters by two rows, totally 10. You can display the characters anywhere you want. Make an animation if you want.
via [Arduino Forum] source [liudr blog]
