Otto needed some new faster way of getting around and borrowed some tracks from SMARS..
He now prefers these to walking..
1 x MAX7219 LED Matrix : http://amzn.eu/0n7TpB7
2 x GA12-N20 6volt dc 150rpm Minature motors : http://amzn.eu/iFdepUK
1 x HCSR04 Ultrasonic range-finder module :http://amzn.eu/eqhd9uw
1 x Noise sensor module (analog output) : http://amzn.eu/gyttfjg
1 x BUNDLE of Female to Female jumper wires : http://amzn.eu/goNhuvi
1 x Active Buzzer (not passive) : http://amzn.eu/dY53v9j
1 x HC-06 Bluetooth module : http://amzn.eu/cY51dmd
THESE PARTS CAN BE FOUND ELESWHERE ON THE INTERNET AND ARE LISTED HERE AS AN EXAMPLE, YOU MAY BUY THEM FROM YOUR LOCAL SUPPLIER.
1 x POWER SOURCE: which ever you prefer, a standard 9volt battery into the Arduino VIN pin will work, or a LIPO battery and a suitable DC-DC converter into the +5v pin, the choice is yours.
1 x DC motor driver (two motor output) : your choice !
1 x ARDUINO : your choice, either NANO or UNO !
Please visit Otto and SMARS for more information on their design.
Larger items I printed with a rim
I used a 2mm drill bit to enlarge one side of the Track segment as it was a little too tight and would not move freely.
Otto has an Android app for Bluetooth control, all information and code can be found on my github
ANDROID app to control Otto
Otto with his trailer collecting old feet!
I took the SMARS tracks and wheels, added them to Otto.
Some people are reporting that the Amazon links are not working, try to copy and paste the links directly into your browser, if this does not work I have included some screen shots below of the components.