This project involved the analysis, design and implementation of an LED lighting control system capable of producing white light with consistent color and intensity. Four monochromatic strings of red, green, blue and amber LED's were arranged in a staggered pattern for uniform color mixing and driven by a pulse width modulated (PWM) control system. Optical feedback was incorporated using a dual p-n junction photo sensor, providing balanced color mixing regardless of changes in LED junction temperature or manufacturing variations. Both LED duty cycle and peak current were successfully controlled to produce white light with the desired intensity and color temperature.

• This report represents the work of one or more WPI undergraduate students submitted to the faculty as evidence of completion of a degree requirement. WPI routinely publishes these reports on its website without editorial or peer review.

Creator

• Gagliardi, Robert J.
• Choi, Eugene
• Turcotte, Brendan J.

Publisher

• Worcester Polytechnic Institute

Identifier

• E-project-042909-014324

Advisor

• McNeill, John A.
• Bitar, Stephen John

Year

• 2009

Sponsor

• NECAMSID

Date created

• 2009-04-29

Resource type

• Major Qualifying Project

Major

• Electrical & Computer Engineering

Rights statement

• In Copyright

最新修改

• 2021-01-07