With a bunch of LEDs, some spare time, parts and an Arduino you can make all sorts of interesting and useful devices, and one of those is a very large digital thermometer. During a recent holiday break Instructables member Sobaka-Gemini did just that - by mounting lots of 10mm LEDs into a drilled wooden disc. This resulted with a pixelated numeric display that could be considered to have a retro feel about it.
The Arduino receives temperature data from a DS18B20 temperature sensor, and controls the higher power required for all the LEDs through a series of MOSFETS. For a quick holiday project - it was quite successful, as shown in the following video:
To get started with your own temperature-controlled or measurement projects, consider using our TEMP: DS18B20-based temperature sensor module:
... or our HUMID: Humidity and Temperature sensor module based on the popular DHT22 sensor unit. Both modules are fully documented and easy to get started with. These are only two of over a dozen of our sensor and outputs modules.