Teaching the Raspberry Pi how to read analog inputs is easier than you think! The Pi does not include a hardware analog to digital converter, but a external ADC (such as the MCP3008) can be used along with some bit banged SPI code in python to read external analog devies. Here is a short list of some analog inputs that could be used with this setup.
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There is a bit of repeated text on page two.
Thanks for this tutorial and stocking this part, exactly what I was looking for.
A suggestion would be to add the info for hardware SPI for those distributions that allow it, it’ll free up some GPIOs.
Keep up the good work!
@mike – thanks, we’ll take a look at it. We’ll have a hardware SPI distribution/tutorial shortly