This is a circuit in which LED glows slowly in the beginning, then grows brighter and once again slowly it becomes dim. The basis of the whole circuit is an operational amplifier IC named LM358. This ...

After construction, enclose the circuit in a small plastic box. Drill a 5mm hole in the centre of the enclosure and fit the LED in a suitable LED holder in the 5mm hole. Finally fit a supply input ...

You can make a bicolour LED night lamp powered by a supercapacitor that is based on joule thief circuit for charging the supercapacitor. Most night lamps go off when AC mains power fails. This night ...

Abstract: Purpose: Consider a method for analyzing led lighting lines. Design/methodology/approach: To analyze the led line, the authors suggest replacing the led lamp with a replacement circuit in ...

White LEDs are replacing the conventional incandescent and fluorescent bulbs due to their high power efficiency and low operating voltage. These can be utilised optimally for emergency lamp and ...

Abstract: The LED technology is very widespread in home and commercial applications with a particular interest for the lighting aims. Nowadays, there is an increasing effort in developing efficient ...