2,486
edits
Changes
Jump to navigation
Jump to search
Line 225:
Line 225: + + + +
Activities/Turtle Art/Using Turtle Art Sensors (view source)
Revision as of 03:18, 4 February 2011
, 03:18, 4 February 2011→Measuring DC Amps
==Measuring DC Amps==
==Measuring DC Amps==
<b>DO NOT CONNECT TO DANGEROUS VOLTAGES. THE LAPTOPS CAN BE DAMAGED BY EXCESS OR REVERSE VOLTAGE ON EITHER THE MICROPHONE SOCKET OR POWER SOCKET AND BY EXCESSIVE CURRENTS BETWEEN THE GROUNDS OF ANY OF THESE SOCKETS</b>
<b>DO NOT CONNECT TO DANGEROUS VOLTAGES. THE LAPTOPS CAN BE DAMAGED BY EXCESS OR REVERSE VOLTAGE ON EITHER THE MICROPHONE SOCKET OR POWER SOCKET AND BY EXCESSIVE CURRENTS BETWEEN THE GROUNDS OF ANY OF THESE SOCKETS</b>
See also [[Activities/TurtleArt/Using_Turtle_Art_Sensors#Measuring_DC_amps_2]]
The current flowing in a DC circuit can be measured by measuring the voltage accross a series resistor. The resistor value is chosen so that the voltage across it is within the measurement range of the XO (0.4-1.8V XO1, 0.17V-3.0V XO1.5) and as low as possible consistent with that to minimise influences on the measured circuit.
The current flowing in a DC circuit can be measured by measuring the voltage accross a series resistor. The resistor value is chosen so that the voltage across it is within the measurement range of the XO (0.4-1.8V XO1, 0.17V-3.0V XO1.5) and as low as possible consistent with that to minimise influences on the measured circuit.