Ad
related to: darkness detector using ldr
Search results
Results From The WOW.Com Content Network
A photoresistor can be used in light-sensitive detector circuits and light-activated and dark-activated switching circuits acting as a semiconductor resistance. In the dark, a photoresistor can have a resistance as high as several megaohms (MΩ), while in the light, it can have a resistance as low as a few hundred ohms.
A densitometer is a device that measures the degree of darkness (the optical density) of a photographic or semitransparent material or of a reflecting surface. [1] The densitometer is basically a light source aimed at a photoelectric cell . [ 2 ]
A microbolometer is a specific type of bolometer used as a detector in a thermal camera. Cryogenic detectors are sufficiently sensitive to measure the energy of single x-ray, visible and infrared photons. [18] Pyroelectric detectors detect photons through the heat they generate and the subsequent voltage generated in pyroelectric materials.
Conceptual through-beam system to detect unauthorized access to a secure door. If the beam is interrupted, the detector triggers an alarm. A photoelectric sensor is a device used to determine the distance, absence, or presence of an object by using a light transmitter, often infrared, and a photoelectric receiver. They are largely used in ...
In physics and in electronic engineering, dark current is the relatively small electric current that flows through photosensitive devices such as a photomultiplier tube, photodiode, or charge-coupled device even when no photons enter the device; it consists of the charges generated in the detector when no outside radiation is entering the detector.
Using lower-fat meat can lead to a dry loaf. Garten's recipe calls for 81% lean ground chuck, which keeps the dish from being too fatty. You can look for 85/15 ground beef, which is 85% lean beef ...
A massive power outage blanketed most of Puerto Rico early Tuesday, leaving more than 1.2 million people without electricity. Here's what to know about the blackout and Luma Energy, which handles ...
Using today's rates, a $10,000 immediate annuity for a 65-year-old might pay around $75 to $80 monthly for life. Delaying payments or investing more money would increase this amount.