So a Turbidity Meter holds one light source that is directed through a water sample ... sensor lifted from a defunct washing machine, the ordered Gravity Arduino Turbidity Sensor from DFRobot arrived ...

The microcontroller-based concept was chosen because I wanted to scale the sensor system later to suit other applications. Here is the diagram of my Arduino infrared close ... receiver IR1 is only ...

[Richard’s] DIY air quality meter ... direct light, but only light reflected by the passing by dust particles, to reach the photodiode. An accurately trimmed amplifier within the sensor package ...

Most ambient lights and sensors are designed to generate light to even out the picture on the front of the panel and reduce any light bleed from the back of an LCD display. This Arduino-powered ...

The camera originally came with an analog light meter built-in ... that incandescent lights flicker at a rate of 50/60 Hz. His sensor was picking this up and the sinusoidal output was causing ...