Python code that can be used to study the system and recreate most of the figures in the book is in the following scripts:
Feel free to copy of the scripts, modify them, and run them yourself.
To run simbrain simulations in Simbrain 3 download it from simbrain.net and invoke the script braitberg.bsh
A more advancd version is planned for Simbrain 4 and and will be linked to here when it's available (updates on Simbrain can be found on twitter). If you are feeling adventurous you can run Simbrain 4 from source. Once it's running, use the simulation menu to call Simulations > Agents > Braitenberg.