Karl Herrick has a great tutorial on his site for controlling a Lego motor with your Raspberry Pi.
When the Gertboard originally came out, it was a do it yourself kit that required soldering, and it had enough pieces that made me want to wait until one was offered pre-assembled (you can still get one like the original from Tandy called the Multiface Kit). After purchasing the latest version, I tried putting one of the Lego motors we have around the house through its paces. Using one of the older models (4.5v Lego motor #6216m) and learning from the examples in the Python Gertboard Suite made crafting my own setup surprisingly easy.
The main steps were to code a motor controlling script in Python (see lego-motor-control.py), and demo it in Bash (see lego-motor.sh). I find tinkering around with these components immensely rewarding while exploring topics like the Internet of Things…
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