This is a newbie question but I was trying to calculate the resistance required to ensure 3.3 V:
Max Specs: 40.0 mA, and 5V
V = IR ===> R = V/I Resistance Required = (5V - 3.3V) / 0.040 A = 42.5 ohms
So why is this guy using 1.2 k Ohms? http://www.instructables.com/id/Cheap-2-Way-Bluetooth-Connection-Between-Arduino-a/step3/Wiring-the-Arduino-Bluetooth-transceiver/
I'm really confused...