Coffeematic PC – A coffee maker computer that pumps hot coffee to the CPU
43 comments
·August 1, 2025jfengel
swiftcoder
Maybe one wants a mini heat pump between the CPU and the coffee. 50º C is plenty for a heat pump to very efficiently push the temperature on the other side to 98º C or so
umanwizard
I'm not expert in CPU water cooling but I'd guess the CPU would have to be way over 100C in order to get the water to 80C quickly.
macNchz
You could recirculate water past the CPU via an insulated storage carafe. This would create a fun and exciting gamble wherein you might receive a freshly brewed pot of coffee OR your computer might turn itself off just before the water is hot enough to brew with, and the time it would take would be based on how hard you worked the PC.
reactordev
This, except when it comes time to actually brew, it goes to a 5.25” slot to heat up, then you can determine the best delivery mechanism for your build. Shot/Kup, drip, pour over, just don’t build a french press PC.
And have a reservoir large enough to replenish the closed loop circuit when you press the button.
reaperducer
The CD ROM drive should open so you can insert a paper cup and then the coffee dispenses into it.
mulmen
Use a heat pump to keep the CPU (and GPU as a secondary heat source) at a lower temperature then heat the coffee water with a secondary heat exchanger. Then you can control the temperature of both cooling loops independently.
Lio
I’d like to see this project extended with AI to work out what drink the user really wants before dispensing a drink almost, but not entirely, unlike tea.
Share and enjoy!
Groxx
I'm glad someone is still building what needs to be built <3
mtillman
SGI was ahead of the game: http://mycollins.net/sgicoffee.png
Joel_Mckay
v0.2a needs to mine crypto to pay for its own coffee beans while peculating the coffee. =3
MostlyStable
I assume you meant "percolating", but you very nearly spelled "speculating", which, given the crypto, seems more appropriate.
fadesibert
And of course, peculation means misappropriating or embezzling funds. Again, given crypto (and certain notorious crypto exchanges), even more appropriate.
Joel_Mckay
Never, the French Press is superior in every regard. lol =3
bitcrshr
No worries of HTTP 418 here.
zeta0134
This is the very best kind of silly project. :) I'm pleased to learn that the coffee is an effective (... sortof) heatsink and not merely part of the case.
iammrpayments
I don’t know what the pipes are made of, but doesn’t look like something I’d like to heat and run my water through it before drinking it
ZiiS
Usually PVC not dissimilar to your home plumbing; but yes at temperate it can leach.
ghm2180
A key with haptic feedback that when pressed runs the CPU/GPU and as water heats up the button lets you know. Calibrate feedback to temperature and ease off the button when the water is done.
happycube
Someday this should be upgraded to an 8th or 9th gen core i7. ;)
bluelightning2k
100% Java compatible
9front
He's using "Linux Mint" for OS. Should have used "Coffee Linux" instead.
dabumere
This just made me smile
parlortricks
Time for you to use my 1080ti with Furmark too cook some eggs and bacon to go with the coffee.
Why not rig it the other way: pump water past the CPU, then through your coffee grounds?
It probably wouldn't be great for your CPU, because the temperature required to properly brew coffee is hotter than you really want for your CPU. But maybe get the water to 80C, and a secondary heater after that.