Submitted by TrystanLea on Sun, 02/07/2010 - 10:55.
5V and GND and the 2 resistors produces a voltage divider that outputs 2.5V - which biases the ac input voltage to "center" around 2.5V instead of 0V and therefore the voltage at the arduino stays within the range of 0 to 5V, does that make sense?
5V and GND and the 2
5V and GND and the 2 resistors produces a voltage divider that outputs 2.5V - which biases the ac input voltage to "center" around 2.5V instead of 0V and therefore the voltage at the arduino stays within the range of 0 to 5V, does that make sense?