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Digital LED Pixels : instructions for use and a characterization of their properties.

Jones, P.R. and Garcia, S.E. and Nardini, M. (2016) 'Digital LED Pixels : instructions for use and a characterization of their properties.', Behavior research methods., 48 (4). pp. 1266-1284.

Abstract

This article details how to control light emitting diodes (LEDs) using an ordinary desktop computer. By combining digitally addressable LEDs with an off-the-shelf microcontroller (Arduino), multiple LEDs can be controlled independently and with a high degree of temporal, chromatic, and luminance precision. The proposed solution is safe (can be powered by a 5-V battery), tested (has been used in published research), inexpensive (∼ $60 + $2 per LED), highly interoperable (can be controlled by any type of computer/operating system via a USB or Bluetooth connection), requires no prior knowledge of electrical engineering (components simply require plugging together), and uses widely available components for which established help forums already exist. Matlab code is provided, including a ‘minimal working example’ of use suitable for use by beginners. Properties of the recommended LEDs are also characterized, including their response time, luminance profile, and color gamut. Based on these, it is shown that the LEDs are highly stable in terms of both luminance and chromaticity, and do not suffer from issues of warm-up, chromatic shift, and slow response times associated with traditional CRT and LCD monitor technology.

Item Type:Article
Keywords:Light emitting diode, Arduino, Luminance, Timing, Color gamut.
Full text:(VoR) Version of Record
Available under License - Creative Commons Attribution.
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Full text:(VoR) Version of Record
Available under License - Creative Commons Attribution.
Download PDF (Final published version)
(4286Kb)
Status:Peer-reviewed
Publisher Web site:https://doi.org/10.3758/s13428-015-0653-5
Publisher statement:© The Author(s) 2015. This article is published with open access at Springerlink.com This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
Date accepted:10 August 2015
Date deposited:18 November 2015
Date of first online publication:20 October 2015
Date first made open access:No date available

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