DIY flex sensor using a LED, a LDR sensor and a plastic bendable tube covered in black tape. LED and the LDR are placed in each end of tube. When the tube is straight, light from LED reaches the LDR ...

Lighthouse position tracking system consists of: – two stationary infrared-emitting base stations (we'll use existing HTC Vive setup), – IR receiving sensor and processing module (this is what we'll ...

Motion sensor alarms are readily available in the market, but these are expensive. Here is a simple and inexpensive Arduino based motion sensor alarm with voice alert. It can be used for security ...

In Thailand, smoke pollution caused by slash-and-burn agriculture has become a serious social problem, but many people cannot afford to purchase an air quality sensor that costs more than tens of ...

No one likes a flickering light source, but lighting is often dependent on the quality of a building’s main AC power. Light intensity has a close relation to the supply voltage, but bulb type plays a ...