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The one caution with a pi is that anything that needs true real-time processing isn't possible, there's no way to stop the os doing it's thing with it's scheduler. It's mostly probably kinda fine for most home projects though, you can always deal with a little delay.
What was the 4 year ago project? I started uni with all the enthusiasm in the world for projects like this but it wore thin pretty quick when it was the day job too.
yoshy-
Don't need anything real time for my heating I suppose? It's just an on/off signal to control the boiler AFAIK...
The other project is a little MIDI keyboard that I can play with my feet. Basically what this guy has:
I was disassembling children's keyboards for a while before I realised I could just dump some pre-written MIDI control stuff onto an Arduino and just connect the buttons up
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There are a couple of real-time OSs that you can install on a raspberry pi, but yeah, if RT is a priority then teensy/arduino is probably a better bet.
frankenbike
cyclotron3k
And it runs Arduino software, that's cool. I've got another project (which I started 4 years ago...) that uses an Arduino but the one I've got is a Duewhateverthefuck so a Teensy would be a massive upgrade, I think I'll get one.
Seeing as I've already got a Pi-Hole going I suppose it makes sense to use that. I didn't actually know the Pi had IO pins...