Jodhpur have developed a new low-cost mobile tool to detect arsenic contamination in water sources, addressing a critical ...

The prototype has a threshold set via potentiometer ... a proximity sensor. The sensor shown here is essentially two plates mounted side-by-side, attached to an Arduino Nano using the Capacitor ...

hacked it in with an Arduino. The video does a wonderful job going into the details, but essentially by using an oxygen sensor with finer resolution (wide-band) and then outputting the appropriate ...