![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjyUAxlXGvy3ejKc2Mp4FUBzh4Pjkwx4nlZXYJ7RMzvdHkNcDQF3POXpaYjwI_HZJYAOybQN4q0GMkkpyQOE3c_oBCekpgEEZmqMOILdTywWyGpQg4NSUug6I3loy1vIlKd-bYdOu1CgTk/s200/N0_front.jpg)
Number zero (N0) is my first attempt to build a robot. This toy tractor is built from LEGO® Technic parts. (
back view) The toy is driven by Java ME™ MIDlet on a mobile phone via Bluetooth (JSR82).
Small board on the tractor comprise of
BlueSMiRF Bluetooth class 1 module and Atmel's
ATmega88 controller. Two 71427
LEGO® 9V motors are controlled by TI's
SN754410 configured as a dual H-bridge.