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.

The TSL2561 sensor combines one broadband photodiode (visible plus infrared) and one infraredresponding photodiode on a single CMOS integrated circuit capable of providing a near-photopic response ...

When used with Vishay’s VLMTG1400 green LED, the photodiode’s small size and sensitivity enable slim sensor designs for optical heart rate detection in wearable devices such as fitness ...

The sensor demonstrated successful 1390 nm imaging results, offering an environmentally-friendly alternative to first-generation quantum dots that contain lead, which limited their widespread ...

The VEMD8081’s rectangular shape maximizes the area of the photodiode receiving reflected light, eliminating the wasted area typically found in square photodiodes.

He was tasked with measuring the light intensity of two photodiodes. The expected impulses picked up by those components will be less than a nanosecond in duration, putting some special design ...

ActLight SA, the start-up company founded in 2011 and based in Lausanne - Switzerland, focuses on the field of CMOS photonics by developing a new type of photodetector, the Dynamic PhotoDiode (DPD).