The Arduino platform lies somewhere between Technic Lego and the low level geek world of circuit building. It consists of two parts; the hardware and the software, and with these you can build ...

Nice method and analysis. The temp sensor 3 pin devices are simple and cheap but good for 0.5 deg C precision or nearly a full degree in human measure.

[Fran’s] been working on her own version of the Arduino. She calls it CuteUino for obvious reasons. The size of the thing is pretty remarkable, fitting within the outline of an SD card. But t… ...

Roomba it ain't, but if you're either pressed for cash or have a tinkerer's itch, then you'd probably be more comfortable building your own robotic butler, er, vacuum cleaner.