Airthings has announced the release of Corentium Home 2, a new digital radon detector for home use. This device comes after ...

Metal detectors can be a great source of fun ... This frequency is measured by an Arduino that plots a graph of the received frequency on an OLED display. As the coil is passed near metal objects ...

I have used a red 10-LED bar-graph display (LD-SHB10R) at 12VDC. It works fairly well in conjunction with the half-wave peak detector circuit (12VDC) shown above. The voltage divider for REFOUT and ...