Changes

adding new usb4butia pic
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The motors and sensors interface to the XO through a small PCB, either an [http://arduino.cc/en/Main/ArduinoBoardMega Arduino Mega] and [http://www.fing.edu.uy/inco/proyectos/butia/mediawiki/index.php/Construccion_shield_v1.0 shield] or a [http://www.fing.edu.uy/inco/proyectos/butia/mediawiki/index.php/Usb4butia Usb4butia PCB] (which uses a PIC microprocessor). The connection between the XO laptop and the small PCB is by USB cable. The cable must stay connected while the program is running.
 
The motors and sensors interface to the XO through a small PCB, either an [http://arduino.cc/en/Main/ArduinoBoardMega Arduino Mega] and [http://www.fing.edu.uy/inco/proyectos/butia/mediawiki/index.php/Construccion_shield_v1.0 shield] or a [http://www.fing.edu.uy/inco/proyectos/butia/mediawiki/index.php/Usb4butia Usb4butia PCB] (which uses a PIC microprocessor). The connection between the XO laptop and the small PCB is by USB cable. The cable must stay connected while the program is running.
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[[File:Arduinomega.jpeg|300px]]  [[File:Butiashield.jpg|250px]]    [[File:Usb4butia.jpg|170px]]
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[[File:Arduinomega.jpeg|300px]]  [[File:Butiashield.jpg|250px]]    [[File:Usb4butia.jpg|170px]]
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 +
[[File:Usb4butia187.jpg|170px]]
    
''Shown L-R, the Arduino Mega, the shield PCB which plugs into the Arduino Mega, the Usb4Butia which replaces both boards in later versions of the Butia''
 
''Shown L-R, the Arduino Mega, the shield PCB which plugs into the Arduino Mega, the Usb4Butia which replaces both boards in later versions of the Butia''