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Optoelectronics are devices that are some combination of electrical and optical.  Perhaps the simplest is the Light Emitting Diode or LED which converts electrical energy into light.  A listing of some optoelectronic devices follows.
 
Optoelectronics are devices that are some combination of electrical and optical.  Perhaps the simplest is the Light Emitting Diode or LED which converts electrical energy into light.  A listing of some optoelectronic devices follows.
''Note: this page could use a lot of work, can you help?''
 
  
== ElectroLuminescent Wire ==
+
 
See [[EL_Wire]]
 
 
== LEDs ==
 
== LEDs ==
 
LEDs are diodes designed to produce visible light.
 
LEDs are diodes designed to produce visible light.
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*Part of 7 segment display
 
*Part of 7 segment display
 
*Light source
 
*Light source
* sensor -- the [[multi-touch display#bidirectional LEDs]] article section describes how to use LEDs as a crude light sensor.
 
  
Links
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External Links
  
 
# [http://en.wikipedia.org/wiki/Light_Emitting_Diode Light-emitting diode From Wikipedia, the free encyclopedia]
 
# [http://en.wikipedia.org/wiki/Light_Emitting_Diode Light-emitting diode From Wikipedia, the free encyclopedia]
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# [http://www.uchobby.com/index.php/2008/02/25/improving-the-ping-pong-ball-led-diffuser/ Improving the Ping Pong Ball LED Diffuser ]
 
# [http://www.uchobby.com/index.php/2008/02/25/improving-the-ping-pong-ball-led-diffuser/ Improving the Ping Pong Ball LED Diffuser ]
 
# [[Basic_Circuits_and_Circuit_Building_Blocks#Light_Emitting_Diode_.28_with_current_limiting_resistor_.29 ]]
 
# [[Basic_Circuits_and_Circuit_Building_Blocks#Light_Emitting_Diode_.28_with_current_limiting_resistor_.29 ]]
# [http://alan-parekh.vstore.ca/index.php/cPath/4 Online LED store with good shipping rates]
 
# [http://www.evilmadscientist.com/article.php/throw Some thoughts on throwies] interesting notes on the resistor normally used with an LED.
 
 
== LED Arrays ==
 
 
Lots of LED arranged in a rectangle.  Useful for displays.  Getting cheap now.  Sometimes controlled by row and column time division multipluxing.
 
 
* [http://www.sureelectronics.net/goods.php?id=142 2416 Dot Matrix Red Display information Board] 24 by 16 led for about 12 bucks.
 
* [[PointLess LED Array]]
 
* Some [[multi-touch display]]s use LED arrays
 
* [http://www.seeedstudio.com/wiki/index.php?title=64_LED_Button_Pad 64 LED Button Pad] 8x8 array of RGB-LED-lit buttons, plus PWM drivers, designed to be driven by an Arduino-compatible board ... such as the [http://www.seeedstudio.com/wiki/index.php?title=8x8_RGB_LED_Matrix_Driver 8x8 RGB LED Matrix driver]
 
* [http://www.seeedstudio.com/wiki/index.php?title=RGB_LED_Shield 4x4 RGB LED Shield] Arduino shield
 
* [http://www.mignonette-game.com/ Mignonette game kit] 5x7 bi-color LED matrix and ATMega88 processor [http://www.makershed.com/ProductDetails.asp?ProductCode=MKCE5]
 
* [http://evilmadscience.com/tinykitlist/100-meggyjr Meggy Jr RGB LED Matrix Game Development Kit]
 
  
 
== LCDs ==
 
== LCDs ==
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* Parallel - Parallel displays connect to a microcontroller via a parallel interface( the bitwidth varies from 8bits to 32bits ).  Displays can have a much faster update rate then serial since they allow arbitrary graphs to be display.  The displays are typically much cheaper then serial display starting as low as $20.
 
* Parallel - Parallel displays connect to a microcontroller via a parallel interface( the bitwidth varies from 8bits to 32bits ).  Displays can have a much faster update rate then serial since they allow arbitrary graphs to be display.  The displays are typically much cheaper then serial display starting as low as $20.
 
* Bare glass - These displays do not have built-in controller and are essentially LCD glass with contacts for every segment and backplane. You need a special driver (e.g. PCF8562) to use these or a microcontroller with built-in LCD controller (e.g. ATMega169), however, displays with only one backplane could be driven directly from the microcontroller I/O pins or bank of shift registers which is more convenient (atmel has an appnote on this method). The advantage of this display type is its price - it is not much different from 3-4 digit LED matrices, and it surely outperforms LEDs in terms of power-efficiency.
 
  
 
Finding LCD displays is not easy since huge distributors such as Digikey have a limited selection.  
 
Finding LCD displays is not easy since huge distributors such as Digikey have a limited selection.  
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* [http://www.jameco.com Jameco] - A small selection. Mostly serial.
 
* [http://www.jameco.com Jameco] - A small selection. Mostly serial.
 
* [http://www.seeedstudio.com/depot Seeedstudio] - Free sourcing services with some stock of basic LCD.
 
* [http://www.seeedstudio.com/depot Seeedstudio] - Free sourcing services with some stock of basic LCD.
* [[Topway LCD]] - supplier from Shenzhen, Mainland China
 
* [http://store.gravitech.us/lcds.html http://store.gravitech.us/lcds.html]
 
* [[TVI Electronics]]
 
 
LCDs are extremely commonly used as a [[Microcontroller User Interfaces]].
 
In particular, [[watch display]]s are small displays suitable for [[Open Source Watch]]es -- most of them are LCD displays.
 
  
 
== Photo Diode ==
 
== Photo Diode ==
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== Photo Resistor ==
 
== Photo Resistor ==
 
== Photovoltaic Cell ==
 
== Photovoltaic Cell ==
Also known as solar cells.
 
 
# [http://en.wikipedia.org/wiki/Photovoltaics Photovoltaics - Wikipedia, the free encyclopedia]
 
# [http://en.wikipedia.org/wiki/Photovoltaics Photovoltaics - Wikipedia, the free encyclopedia]
# [http://www.pvresources.com/en/solarcells.php Solar Cells]
 
# [http://www.eevblog.com/2009/12/04/eevblog-48-solar-power-hope/ http://www.eevblog.com/2009/12/04/eevblog-48-solar-power-hope/]
 
 
== VFD: Vacuum Flourescent Display ==
 
Numeric, Alpha or special display.
 
 
*life time - around 10000 to 30000hrs when dim down to 50% brightness
 
*make sure no any dead pt
 
*update rate - around 10mSec for each new update data
 
*command for dim down
 
*no electrostatic effect due to glass material
 
 
Salvage from many microwave ovens and other consumer equipment.
 
 
*[http://www.futaba.com/products/display_modules/module_products/character/index.asp VFD Module Character Displays]
 
 
 
== Other Reading ==
 
 
*[http://www.epanorama.rackhost.net/links/opto.html Optoelectronics and optics page]
 
 
[[Category: Components]]
 

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