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Activities/Turtle Art/Using Turtle Art Sensors (view source)
Revision as of 01:12, 12 November 2010
, 01:12, 12 November 2010→Measuring AC Amps
[[File:Current transformer1.jpg]]
[[File:Current transformer1.jpg]]
Assembled, with optional red heat shrink. The current in the black wire is measured. The 50 turns of fine wire connect to the XO1 in Volume Mode. The maximum is about 15 amps AC before clipping of the AC waveform occurs. To change sensitivity, vary the number of turns.
[[File:Current transformer sensitivity.jpg]]
[[File:Current transformer sensitivity.jpg]]
Volume measured on XO1, to turns.
<i>Volume measured on XO1, 50 turns of wire.</i>
===Measuring power===
DO NOT CONNECT TO MAINS POWER. DO NOT WORK NEAR EXPOSED ELECTRICAL CONNECTIONS.
Power = AC Volts x AC Amps x [http://en.wikipedia.org/wiki/Power_factor Power Factor]
In mains circuits, the voltage is usually known. Typically, power factor is 0.8 or 1.0 depending on the electrical load.
==Links==
==Links==