Technology

Dual Stage Heating/Cooling Temperature Controller with RGB Display

Dual Stage Heating/Cooling Temperature Controller with RGB Display

I am probably flattering myself, taking any sort of credit for inspiring this sweet custom temperature controller built by Adafruit reader Mike to keep his beer-brewing fridge at a constant temperature. Like my recent project, it simultaneously controls AC-powered heating and cooling equipment to maintain a constant temperature, and is mounted in a CANTEX PVC junction box. But there the similarities pretty much end: Whereas I used a cheap off-the-shelf thermostat module from China, Mike built and programmed his own controller using an Arduino for brains, an Xbee for remote temperature control and data logging, and a cool multicolor LED display with letters that turn red when the system is heating, blue when it is cooling, and green when it is at the correct temperature.

“Adalight” OSHW Dynamic Adaptive Display Backlighting

“Adalight” OSHW Dynamic Adaptive Display Backlighting

We’ve posted about Phillips’ Ambilight (Wikipedia) real-time multicolor display backlighting system, and various DIY versions thereof, before (see below). If you’re not familiar with the idea, watch a few seconds of the embedded video, as it’s hard to appreciate the effect from still images. If you believe the hype, this kind of dynamic backlighting improves viewing by making it more “immersive” and reducing “backlight bleed.” In any case, it’s certainly cool-looking.

Foil and Paper Speakers

Foil and Paper Speakers

Catarina Mota, Alicia Gibb and Shelby Arnold built a speaker made entirely from copper foil tape on cardstock. They’re testing it with the JelTone edible piano. The speaker’s design comes from the High-Low Tech Research Group at MIT. The tape is applied to the paper in a coil-shaped pattern. When connected to the output lines […]