Light Related


Posted on Feb 7, 2014

Watch the video given below to get a better idea on how LED works A light emitting diode (LED) is known to be one of the best optoelectronic devices out of the lot. The device is capable of emitting a fairly narrow bandwidth of visible or invisible light when its internal diode junction attains a forward electric current or voltage. The visible l


Light Related
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ights that an LED emits are usually orange, red, yellow, or green. The invisible light includes the infrared light. The biggest advantage of this device is its high power to light conversion efficiency. That is, the efficiency is Introduction. Here is low cost circuit that can be used for implementing a warning light on the top of tall structures as a warning for low flying aircrafts. Usually such lights are just stay glow type. Here our light is a flashing type, and surely this will draw more attention and of course add more safety. When the AC mains is switched on the bulb will get supply and it will glow. When the bulb glows the LDR adjacent to it gets illuminated and it`s resistance drops. This will increase the voltage drop at the base of transistor Q1 and This is a modification of the circuit Simple Lamp Dimmer/Fan Regulator previously posted here. The working of the circuit is same as that of the previous, but in addition a snubber circuit consisting of resistor R4 and capacitor C3 is included to improve the performance of the triac T1. A fuse is also included for better safety. I think this is the better circuit to try. Circuit diagram with Parts list. Notes. No matter how what ever may be the load lamp, fan, heater or anything it should be rated less than 200 Watts. No matter how A Simple Light activated switch This is the circuit diagram of a light activated switch based on National Semiconductors comparator IC LM...




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