Title

A microcontroller based LED sunphotometer with RF data acquisition

College

College of Science

Department/Unit

Physics

Document Type

Article

Source Title

ARPN Journal of Engineering and Applied Sciences

Volume

10

Issue

22

First Page

10591

Last Page

10596

Publication Date

1-1-2015

Abstract

A microcontroller based four-channel LED sunphotometer system with RF transceiver system was successfully developed in this study. The control and data acquisition was done wirelessly using a Zigbee RF Transceiver Module. The RF transceiver module was connected to the sun tracking mount and to a personal computer. Sun tracking was done using a quadrant photodiode for feedback control and a mathematical algorithm for tracking the sun for low-sunlight intensity situations. High correlation coefficients were obtained when the data obtained from the four LED channels of the system was compared with a commercial four channel SP02 sunphotometer. With this system, the sun tracking mount can be placed anywhere without the need for long wires as long as there exists a line of sight between the two RF transceiver modules. © 2006-2015 Asian Research Publishing Network (ARPN).

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Disciplines

Physics

Keywords

Astronomical photometry; Atmospheric aerosols; Microcontrollers; Light emitting diodes

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