Arduino_project_voltages.xls BenitezMaria 2012 <p>This data contains the input and output voltages in a circuit consisting of :</p> <p>an arduino</p> <p>9V battery</p> <p>4 x LEDs</p> <p>4 x 220 Ohm resistors</p> <p>1 x Push button switch</p> <p>1 x 220kOhm resistor</p> <p> </p>