BioBoard/Documentation/Optical loss

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Measuring optic loss - different techniques
 
Measuring optic loss - different techniques
 +
 
Optic loss as a proxy for biomass
 
Optic loss as a proxy for biomass
  
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Light source and light sensor pairing
 
Light source and light sensor pairing
 +
 
Discussion of pros/cons of different source/sensor pairs
 
Discussion of pros/cons of different source/sensor pairs
  
 
==What you need==
 
==What you need==
  
IR LED
+
*IR LED
Phototransistor
+
*Phototransistor
2 5kΩ resistors
+
*2 5kΩ resistors
Wire
+
*Wire
Soldering iron + solder
+
*Soldering iron + solder
¾" acrylic tube
+
*¾" acrylic tube
¾" acrylic discs
+
*¾" acrylic discs
Acrylic cement (thick)
+
*Acrylic cement (thick)
1" PVC pipe
+
*1" PVC pipe
Aquarium glue/hot glue  
+
*Aquarium glue/hot glue  
 +
 
 
Optional: cell-phone motor (BubbleShaker Technology)
 
Optional: cell-phone motor (BubbleShaker Technology)
  
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Cutting acrylic and PVC
 
Cutting acrylic and PVC
 +
 
Drilling holes
 
Drilling holes
 +
 
Soldering wires
 
Soldering wires
 +
 
Fixing diodes
 
Fixing diodes
 +
 
Glueing discs on tubes
 
Glueing discs on tubes
 +
 
Plugging tubes
 
Plugging tubes
 +
 
Covering it up
 
Covering it up
  
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Aquarium glue vs hot glue
 
Aquarium glue vs hot glue
 +
 
Biologically inert materials
 
Biologically inert materials
 +
 
Food safety
 
Food safety
  
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How to find out whether your measurements are accurate
 
How to find out whether your measurements are accurate
 +
 
How to adjust (distance, resistance)
 
How to adjust (distance, resistance)
  
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Reduction of light passing through a mass
 
Reduction of light passing through a mass
 +
 
Absorbance vs. scattering
 
Absorbance vs. scattering
  

Revision as of 22:22, 26 April 2011

Contents

Introduction to absorbance

Measuring optic loss - different techniques

Optic loss as a proxy for biomass

Building an NIR probe

Light source and light sensor pairing

Discussion of pros/cons of different source/sensor pairs

What you need

  • IR LED
  • Phototransistor
  • 2 5kΩ resistors
  • Wire
  • Soldering iron + solder
  • ¾" acrylic tube
  • ¾" acrylic discs
  • Acrylic cement (thick)
  • 1" PVC pipe
  • Aquarium glue/hot glue

Optional: cell-phone motor (BubbleShaker Technology)

How to build it

Cutting acrylic and PVC

Drilling holes

Soldering wires

Fixing diodes

Glueing discs on tubes

Plugging tubes

Covering it up

Things to keep in mind

Aquarium glue vs hot glue

Biologically inert materials

Food safety

Interfacing and measuring

Arduino sketch should go here...

Calibrating

How to find out whether your measurements are accurate

How to adjust (distance, resistance)

Making it cooler

Multi-channel measurements

Geeking out

Reduction of light passing through a mass

Absorbance vs. scattering

Links

Optek

Personal tools