This document explains some of the design considerations you might want to think about when building your robot.
The core electronics are as discussed for the basic SimpleBot build. You should have a robot you can control with a keyboard to drive around.
- 1x Ultrasonic range finder
The diagram below shows the electronics schematic for a basic set up.
Note that the echo and trigger pins on the sensor are wired to the same pin as the arduino can use both.
As you see the range finder looks like a pair of eyes and it does "see" like a bat. As such you want to mount these on the front of your robot so they are unobstructed. Cable ties work very well for this.
In the examples/simplebot-avoidance.js file you can see a basic example that
will allow you to drive around until you get within 10cm of an obstacle and
then the SimpleBot will stop.