Open AccessLoad current, dropped voltage and size considerations in LDR based light control system
Author(s) -
Rudi Arif Candra,
Suherman Suherman,
Yulianta Siregar
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/644/1/012015
Subject(s) - electrical engineering , transformer , resistor , incandescent light bulb , electronic circuit , voltage , distribution transformer , flyback transformer , current transformer , engineering
Energy consumptions are dominated by lighting and air conditioning. Automatic controlling is the solution as human awareness is unreliable. Lighting and air conditioning can be automatically controlled by employing light sensor as well as human existence sensor. Light bulb and street lighting have been widely equipped by light sensor such as the light dependence resistor (LDR). LDR sensor circuit can be made transformer less and transformer based. Transformer less LDR circuit can be integrated into light bulb while transformer based LDR circuit is designed as a standalone device. This paper examines power consumption, load current and circuit size of both LDR circuits. Experiments show that transformer less LDR circuit consumes higher power with limited load current. However, its size is smaller. On the other hand, transformer based LDR circuit consumes less power and provides larger load current. But the challenge is the transformer size to overpower the transformer less circuit.