I am working on a project and I am planning to use Xbee radio modules. However. I need some features that the Xbee shield does not provide, and therefore I decided to have a PCB built that will include several components (Xbee + additional circuitry, AC/DC adapter, MAX232 chip for serial communication...)
I have some doubts regarding the Xbee circuitry required... I have read everywhere that I need a power regulator to supply the Xbee chip with 3.3Volts... But why can´t I simply use the Arduino 3.3V pin?
In case I do need a specific regulator for this, what the requirements would be? Of course I need an output power of 3.3 Volts, but I´m not sure about the minimum/maximum output current... any help?
And also, I have already seen several datasheets and I noticed that I normally need a number of capacitors around the power regulator... I am quite a newbie in electronics and I never liked working with capacitors, can I just assume that the circuit that manufacturers provide will work with my Xbee or do I need something different?
Thanks a lot folks!