Automatic Night Lamp with Morning Alarm using 8085 Microprocessor

As the name suggests “Automatic Night Lamp with Morning Alarm” was developed using Microprocessor. 8085 is the Heart of the system. The sensors are made with help of LDR which are Light Dependent Resistors, whose Resistance is inversely proportional to the Light falling on it. The LDR converts the light energy into electrical energy and this variable electrical energy was converted into digital signal (0 or 1) by using the timer IC555....

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difference between earthed and unearthed cables

Introduction:In HT electrical distribution, the system can be earthed or unearthed. The selection of earthed/unearthed cable will depend on system. If distribution system is earthed then we have to use cable which is manufactured for earthed system. (Which the manufacturer specifies). If the system is unearthed then we need to use cable which is manufactured for unearthed system. The unearthed system requires high insulation level compared to earthed System.For earthed and unearthed XLPE cables, the IS 7098 part2 1985...

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electrical engineering question and answers | interview questions with answers | multiple choice q & a's

 here,u can get electrical engineering question and answers and multiple choice questions and interview questions part - 11)     Why ELCB cannot work if Neutral input of ELCB does not connect to ground?ELCB is used to detect earth leakage fault. Once the phase and neutral are connected in an ELCB, the current will flow through phase and that same current will have to return neutral so resultant current is zero.Once there is a ground fault in the load side, current from phase will directly pass through...

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