(Mods: Didn't know if this would go for internal or external hardware, because it's kind of both. Feel free to move it if I got it wrong)
Well, I finally finished (well, almost) another one of my "projects" (which is really what happens when I get bored and decide to throw some random stuff together and make something as complicated as possible). "Frankenstein's Monster" is my work in progress at a Beowulf cluster (just need to find a MPI and figure out how to get it to work).
It's running in a cabinet right now, and is going to get HOT (CPUs running at 100% constantly). I have all the vents facing the front, and I'm keeping the cabinet doors open, which should reduce the chance of getting "magic blue smoke of failure". Right now I'm using a ceramic liquid thermometer to measure the temperature, which I have to keep checking pretty much every hour. --- >> (Actual question) What I want is a thermometer with a digital readout, that can switch between Fahrenheit and Celsius, and that can have an alarm sound if the temperature reaches a certain point. << ---
The cluster itself is built out of 4 desktop towers, 3 PIIIs, and 1 P4, a 12 port rackmount switch, a wooden cabinet, and a ceramic thermometer with flowers and birds on it.