Another take on roasting those beans

[Andrew] takes his coffee very seriously and like any hardcore aficionado he wanted to do the roasting himself. The coffee roaster design uses a heat gun for the roasting and sources an old bread maker as a vessel. As part of the automatic bread making process there’s a little agitator arm inside which keeps the beans moving while the heat is applied. A computer controls the heat gun, adjust with feedback from a temperature sensor. We had a bit of a laugh reading about melted temperature sensors, but design flaws aside this computer interface allows rather strict control of the roasting profile.

Reader [Youseff] tipped us off about this after seeing the Popcorn Coffee Bean roaster from last week.

Salty LEDs

[Davross] pulled off an LED lighting build for his coral aquarium. The module consists of a wooden body holding a 3×16 grid of LEDs. They are mounted to heat sinks which themselves have cooling fans to help keep those puppies from melting. The system is controlled by an Arduino which allows for almost limitless lighting options. The photo above shows the LEDs running at 50%. He’s also taken some photos of the tank in “moonlight” mode. It’s a long and detailed forum thread but you can skip to some nice photos of the coral under the lights or details about the build.

[Thanks Passmadd]

And we’re back

Several of you were rather angry with us yesterday for our competition. Those not in the loop, our email competition@hackaday.com was not correctly configured and no body could send in their entries!

But have no fear, we have fixed the problem and now you can send in your guesses. To remedy the situation we have decided to extend the competition until 10AM PST Monday the 1st of February, 2010. We will announce the winner (so long as nothing else fails) Monday afternoon. So what are you doing here still reading? Time is wasting – go win some tickets!