To help designers of such systems, this circuit accurately measures ambient light intensity over four decades of measurement. The design is highly cost effective and, with the sensor mounted in a ...

He’s built a finger-mounted pulse detector using a few simple components and an Arduino. This circuit uses a method ... This method uses a light source and a detector to determine changes ...

It relies on the smoke that is produced in the event of a fire and passes between a bulb and an LDR, the amount of light falling ... this smoke alarm detector. Using this photoelectric smoke detector ...

By using a few simple components, it's possible to build a low-cost Geiger detector. Detecting α radiation ... A simple Zener-diode stabilization network circuit using D2 supplies a voltage ...

It doesn't fluoresce, absorb ultraviolet light or readily ionize ... Now, chemists from the University of Illinois have announced a simple new way of detecting even minute concentrations of ...

Researchers have developed a new optical sensor that provides a simple way to achieve real-time ... A portion of the light traveling through the core also extends into the surrounding fiber ...

Figure 4b illustrates the detection efficiency measurement: each photonic circuit consists of an input grating coupler, which launches light from the fiber coupled laser into the diamond waveguide.