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Line 257: − Shown below is a triggerable oscilloscope with calibrated timebase. The logging rate can be increased (Turtle Blocks104) by patching one of the Turtle Art files, <i>talogo.py</i> in directory <i>home/olpc/Activities/TurtleArt.activity/TurtleArt</i> changing <i>self.max_samples</i> from 1500 to 150, This reduces the repeat loop from 15mS to 4mS but there is around 50mS jitter. Datalogging can be done without patching the file, using wide switches and shallow ramps keeps the events within the capability of the XO laptop.+ + + +
Activities/Turtle Art/Using Turtle Art Sensors (view source)
Revision as of 17:23, 25 November 2010
, 17:23, 25 November 2010→Acceleration on an inclined plane
The logging rate can be increased (Turtle Blocks104) by patching one of the Turtle Art files, <i>talogo.py</i> in directory <i>home/olpc/Activities/TurtleArt.activity/TurtleArt</i> changing <i>self.max_samples</i> from 1500 to 150, This reduces the repeat loop from 15mS to 4mS but there is around 50mS jitter. Datalogging can be done without patching the file, using wide switches and shallow ramps keeps the events within the capability of the XO laptop.
Shown below is a triggerable oscilloscope with calibrated timebase. Action 1 clears the screen and draws the scale, the program waits in action 2 until triggered by the first switch.