this post was submitted on 20 Mar 2026
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You can/could also find Coffee HOWTO in your distro's HOWTO package. (I found a reference back to v0.5 of the document in 1998.)
Has simple schematics to get you started for the hardware, using the parallel port to toggle relays.
It's a very neat little document, and inspired me to write a simple kernel module so I could
echo 1 | sudo tee /sys/whatever/coffee0to turn pin 0 high on the parallel port. (This is silly, and it's much easier to just do things in user space!)Lol, criticism of the turning machine.