Tunable Light Source ECE 480 Team 13 Lab Coordinator..Ruben - - PowerPoint PPT Presentation

tunable light source
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Tunable Light Source ECE 480 Team 13 Lab Coordinator..Ruben - - PowerPoint PPT Presentation

Tunable Light Source ECE 480 Team 13 Lab Coordinator..Ruben Alejandro Manager...Isaac Davila Presentation prep...John Foxworth Web Designer..Haosheng Liu Document


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SLIDE 1

ECE 480 Team 13

Tunable Light Source

Lab Coordinator…………..Ruben Alejandro Manager…………………...Isaac Davila Presentation prep………...John Foxworth Web Designer……………..Haosheng Liu Document Prep…………...Cynthia Patrick

Sponsor: Dr. Chahal Facilitator: Dr. Ayres

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SLIDE 2

Project Goals

  • Create a tunable light source that emulates the black

body radiation curve of the sun.

  • To be used in solar cell testing, as has potential to be

used in a variety of other applications.

  • Design is to be low cost, portable, and user friendly.
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SLIDE 3

Fast diagram

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SLIDE 4
  • Dr. Chahal requires:
  • Coverage of the Electromagnetic Spectrum from 400

nm to 1100 nm

  • Minimum of 25 peak points
  • Illumination of 1 mm2
  • 0.1 W output power
  • Active control via USB
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SLIDE 5

Lighting Options

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SLIDE 6

Halogen Lights

  • Inexpensive
  • Easy to

use/install

  • Readily

available

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SLIDE 7

Halogen Spectrum

  • Wideband

Continuous Spectrum

  • Covers ultraviolet

(UV) to Infrared (IR)

  • IR = Heat
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SLIDE 8
  • Expensive
  • High Power

Consumption

  • Large

Halogen Light System

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SLIDE 9

Lasers

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SLIDE 10

Laser Spectrum

  • Emit Narrow band
  • Very Powerful

Beam

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SLIDE 11

Light Emitting Diodes

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SLIDE 12

Laser Spectrum

  • Emit Narrow band
  • Very Powerful

Beam

  • Large
  • Costly
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SLIDE 13

LED Spectrum

  • Small Range of

wavelengths

  • Inexpensive
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SLIDE 14

Lenses

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SLIDE 15

Fiber Optic Cable

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SLIDE 16

Power Supply

  • 5 volts output voltage
  • 1.5 A output current
  • 10000 mAh
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SLIDE 17

Risk Analysis

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SLIDE 18

Concern:

  • Student Use

Solution:

  • User friendly and

accurate

  • Secure connections and

shock resistant

  • Temperature rated

components; Water proof

  • Easy replacement
  • Physical Robustness
  • All weather operation
  • Component lifetimes
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SLIDE 19

The Design

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SLIDE 20

Prototype

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SLIDE 21
  • 5V power supply
  • LED (various colors)
  • Current limiting resistor
  • Two switching transistors (on/off and PWM)
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SLIDE 22
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SLIDE 23
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SLIDE 24
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SLIDE 25
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SLIDE 26
  • Greenhouse lighting
  • Jaundice treatments
  • Aid the color blind

Potential for Technology Transfer

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SLIDE 27

Questions?