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Activities/Turtle Art/Using Turtle Art Sensors (view source)
Revision as of 02:31, 3 February 2011
, 02:31, 3 February 2011→Hall Effect Sensor
Loudspeakers contain powerful ferrite magnets. The PC speaker magnet (pictured, complete left, disassembled right) produces a voltage swing of +-1V
Loudspeakers contain powerful ferrite magnets. The PC speaker magnet (pictured, complete left, disassembled right) produces a voltage swing of +-1V
[[File:Ferritemagnet.jpg]]
Yes, the sensor is just sensitive enough to use as a compass, the difference between facing north and south is about 1mV. Try the following
Yes, the sensor is just sensitive enough to use as a compass, the difference between facing north and south is about 1mV. Try the following blocks:
forever print voltage x 1000
forever print voltage x 1000
The maximum reading is not on the horizontal, except on the equator. The closer you are to the pole, the further you need to tilt. Why? Why do compas nedles still point level?
The maximum reading is not on the horizontal, except on the equator. The closer you are to the pole, the further you need to tilt. Why? Why do compas nedles still point level?
* maximum speed
* maximum speed
* clock and stopwatch
* clock and stopwatch
===Measuring DC amps===
==Links==
==Links==