A nice review of the Cobbler and a note on how to get better resolution from the MCP3008 by changing the analog reference voltage, from RasPi.tv:
One of the reasons I chose the Cobbler (and Limor, aka LadyAda knows this – it’s the not so secret, secret of Adafruit’s success) was because on the Adafruit website it shows you exactly how to connect it up and gives you working examples of scripts that you can use to achieve a particular purpose. Then you can modify them and make them suit your exact requirements. In so doing, you learn how to do things.
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