Designing of an Electric Light Sensor Circuit using Light Dependent Resistor for Auto Lighting Systems at Home. An experimental design

Lawrance Ngonzi; Willy Kamya

doi:10.51168/sjhrafrica.v3i12.240

Authors

Lawrance Ngonzi Faculty of Education, University of Kisubi.
Willy Kamya Faculty of Education, University of Kisubi.

DOI:

https://doi.org/10.51168/sjhrafrica.v3i12.240

Keywords:

Electric Light Sensor Circuit, Dependent Resistor, Auto Lighting Systems

Abstract

Background :

Due to the increasing wastage of electricity resulting from failure to switch off bulbs during day time, this research aimed at designing an electric light sensor circuit using a light-dependent resistor that helps to switch on and off lights at night and during the day respectively. The specific objectives was to generate an electric light sensor circuit using a light-dependent resistor and to determine the performance of an electric light sensor circuit in terms of resistance due to light exposure.

Methodology:

The research design was experimental; an electric light sensor circuit was designed and tested for its effectiveness. It was designed using resistors, a BC547 transistor, an LDR (Light dependent resistor), an led (bulb), and two resistors. Testing for the effectiveness of the electric light sensor was carried out based on Increasing the voltage on the DC power supply (from 2volts to 9volts) while reading the respective values of the resistance of the electric light sensor circuit using the multimeter and at the same time covering an LDR to create darkness on it.

Results:

A detailed analysis concerning the performance of the Electric light sensor system has been performed and presented. The device performed well using a light-dependent resistor as the light sensor. It was proven that the increase in the intensity of light falling on the light-dependent resistor as a light sensor makes the bulb (led) go off. This meant that during the day when the intensity of light was very high, the bulb (led) was off.

Conclusion:

A detailed analysis concerning the performance of the Electric light sensor system has been performed and presented. The device performed well using a light-dependent resistor as the light sensor.

Recommendation:

The system should next time be operated using the photocell instead of the LDR to improve its effectiveness.

Author Biographies

Lawrance Ngonzi , Faculty of Education, University of Kisubi.

born 1/01/1992 in Bundikakemba west mirambi sub county, Bundibugyo district. Currently living at kisubi Entebbe, he studied a bachelor of science education from university of Kisubi, did UACE from St. Kalemba SS Nazigo, UCE at Christ school Bundibugyo and PLE Bundikuyali p/s currently he is a teacher of physics and math at secondary school.

Willy Kamya, Faculty of Education, University of Kisubi.

born 2/07/1987 in Lwengo district, he holds an MSc. In physics from Kyambogo university, BSc. Education from Gulu university, completed UACE from Masaka SSS, UCE from Nakyenyi SSS, and PLE from Nakyenyi P/S, currently is a lecturer of physics and a researcher at university of Kisubi in the faculty of education.