User:Ldrengineer

LDR Engineering
LDR (Light dependent resistor) Engineering is a technique of making several electronics circuits following the logic of a simple light and dark sensor using transistors, 555 IC and 741 IC. Out of several optical sensors, light dependent resistor can be used for making light/dark sensors. A dark sensor switches on transistor or LED whenever the incident light intensity is decreased, whereas a light sensor works in opposite way. In LDR Engineering, we first understand the working principle of any circuit using LDR, and then we replace the LDR with a fixed resistor or some other electronic component that makes the simple automatic light/dark sensor work as a completely different device. Making automatic light/dark sensor circuits using different methods can make you observe several electronics components. On the other hand, modifying those automatic light/dark sensor circuits to some functionally different circuits like touch switch, water level indicator, clap switch, etc. can make you understand about those circuits.

LDR Engineering course was designed by a Nepali electronics engineer Sagar Sapkota. The course was implemented on December 16, 2008, for the first time in Kantipur Engineering College, Kathmandu, Nepal.

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