An Optocoupler or opto-isolator as it is also called, is a single electronic device that consists of a light emitting diode combined with either a photo-diode, photo-transistor or photo-triac to provide an optical signal path between an input connection and an output connection while maintaining electrical isolation between two circuits.
A free, easy-to-use computer-aided design software package for Windows platform, that lets you design printed circuit boards of professional quality very quickly
These are high performance supercapacitor electrodes. Left: field emission scanning electron microscope and transmission electron microscope micrographs; Right: sectional view of single hybrid nanostructure.
Although a 7-segment LED display can be thought of as a single display, it is still seven individual LEDs within a single package and as such these LEDs need protection from over current. LEDs produce light only when it is forward biased with the amount of light emitted being proportional to the forward current.
PVDF Piezoelectric sensor is an interesting, low-cost sensor that doesn’t need much processing to use, and has some unique characteristics.
The sensors looks like a small strip of plastic, and can be used for detecting movement or vibrations even into ultrasound. Such devices can help sense in many practical, real-world scenarios. They are extremely sensitive, low cost and easy to use.
A team of researchers from Japanese firm Aerial Burton have showed off focused pulse lasers with the ability to project a 3-D display in mid-air, even during daylight. Unlike other holographic projectors we’ve seen, it doesn’t require fog or steam to display the image and can be displayed using just air as the medium.