1/4W 4.7k ohm resistor

Aquaponics – Online Temperature and Humidity

Aquaponics – Online Temperature and Humidity

The project uses the DHT22 sensor to monitor temperature and relative humidity in an aquaponics system. The data is uploaded to a bare-bones application on Google App Engine and visualized with Google Chart Tools.

Audio Spectrum Analyzer

Audio Spectrum Analyzer

As complicated as I thought this would be, this circuit is using the basic fundamentals of electronics and algebra. The only hard part is perfecting it and expanding it. Click here to see the finished project.