The Carpet Crawler is a small robot which will shuffle its way across your floor. Watch the video, and you will see how it got its name (that, and I'm an old prog rock fan at heart!).
BEAM stands for Biology, Electronics, Aesthetics, Mechanics, and is a school of robot design working on the KISS philosophy - I prefer the "Keep It Sweet and Simple" definition. Google for 'beam robotics' and you'll find a veritable plethora of sites.
The 'brain' of this robot is a latching relay, the sensors are a pair of microswitches and the 'muscle' is a modified servo-motor. Energy comes from 2 x AAA batteries. A pair of LEDs brighten things up a bit.
The original video was blocked almost immediately (in the US) by the copyright stazi, so here it is without the music.
Look HERE to hear the eponymous track (but no Peter Gabriel on this one).
Step 1: Tools and Materials
Almost no special tools required - You will just need standard electronics workbench tools. However, you will need a Very Small crosspoint screwdriver to open the servo.
Brass strip - 1/32" x 1/4" x 8"
2 offcuts of copper strip stripboard
M2 (2mm) nuts and bolts
Micro RC servo (7.5g) with horns and screws.
DPCO latching 3 Volt relay - I got mine from Farnell (9899600)
(They no longer do PCB mounting. This is the SMD version - smaller)
2 x miniature microswitches. Mine came out of a couple of CDROM drives
2 x LEDs - I used red ones. (Blue or white may not work in this application)
1 x 100R resistor (Use 47R if using yellow or green LEDs)
2 x AAA battery holder and batteries
Thin link wire
In the UK we use both Imperial and metric measures. Personally, I tend to think Imperial but measure metric. As a quick reference, 3mm is 1/8" 25mm is 1" 305mm = 1'.