The Design and Comparison of Central and Distributed Light Sensored Smart LED Lighting Systems

Table 3

Cost analysis of the developed energy-saving controller.

Item	Unit cost (USD)	Central/distributed system number	Total cost (USD) central/distributed system
STM32F407 discovery kit	25.6	1/1	25.6/25.6
IRFP250 MOSFET	1.4	1/2	1.4/2.8
10 K multiturn pot	4	1/2	4/8
Optocoupler	0.2	1/2	0.2/0.4
5 V power switch regulator	11.2	1/1	11.2/11.2
MOSFET driver	1.9	1/2	1.9/3.8
TEMT6000 Ambient Light Sensor	5.3	1/2	5.3/10.6
Resistor	0.06	1/2	0.06/0.1
100 nF capacitor	0.07	1/2	0.07/0.1
MOSFET cooler	2.1	1/2	2.1/4.3
PCB	0.4	1/1	0.4/0.4
Proposed central/distributed sensor LED lighting system costs			52.2/67.3