I have been given lots of conflicting information in regards to how to set up the power supply to my device, so I thought I would post here in an attempt to get some clarification. Also apologies if this seems like a simple question, but I am mainly a software guy so am not too clued up on the power side of things.
The shields will be stacked on top of each other.
Now to power these devices I have 6AA batteries wired to this UBEC to regulate the power to 5V 5A.
The SIM900 module needs a large amount of current available (up to 2A) to it during transmission, and the wiki says to power it via the external jack to allow this. The Mega, GPS shield and Wifi shield I believe will operate simply with 5V 500mA.
Now given this information, what is the best way to wire in the power to ensure that the SIM900 gets the full 5A available, and all the other shields are also safely powered?