This Circuit can compare the Light level in an area. It uses a PN Photodiode as the light sensor and IC CA3140 as voltage comparator. The circuit is ideal as the front end of burglar alarm circuits.

This file type includes high resolution graphics and schematics. The photodiode remains the basic choice for photo-detection among solid-state detectors (Fig. 1). It is widely used in optical ...

The circuit was designed to create a detection scheme with reference to light energy sources. Photo Detector – a device that detects and senses light and radiant energy which uses the principle of ...

Scientists developed a photodiode using a crystalline film composed of lead perovskite compounds with organic chiral molecules to detect circularly polarized light without a filter. It is expected as ...

Photonic quantum technologies hold promise to repeat the success of integrated nanophotonic circuits in non-classical applications. Using linear optical elements, quantum optical computations can be ...

Prof. Andrew POON (left), Head and Professor of the Department of Electronic and Computer Engineering at HKUST, and PhD student NIU Yue (right) at the Photonic Device Laboratory. Programmable ...