[Bugs] #552 NORM: Turtle art, reinstate sensor input

[Sugar Labs Bugs]

#552: Turtle art, reinstate sensor input
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    Reporter:  tonyforster  |          Owner:  walter     
        Type:  enhancement  |         Status:  accepted   
    Priority:  Normal       |      Milestone:  0.92       
   Component:  Turtleart    |        Version:  Unspecified
    Severity:  Unspecified  |       Keywords:             
Status_field:  Unconfirmed  |   Distribution:  Unspecified
   Seeta_dev:               |  
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Comment(by tonyforster):

 Test results uploaded for 3 x XO1 - sensor gain.xls
 resistance accuracy +-5%  wrt full scale raw data
 voltage +-3% of full scale
 Hz accuracy  +-46000/len(buf)


 Hz = 46000/len(buf) x index
 Volts = 0.00002225*float(_avg(buf))+1.140
 Ohms = 2.718**(0.000045788*float(_avg(buf))+8.0531)

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Ticket URL: <http://bugs.sugarlabs.org/ticket/552#comment:7>
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