Your power supply problems just got SOLVED! This little circuit board may look tiny but inside is a high-efficiency DC/DC step-down converter that can output up to 3 Amp at 5V without the need of any heat-sink or forced cooling (It does get a bit toasty at 3A though).
UBEC stands for "universal battery eliminator circuit" and this UBEC is designed to replace a 5V supply in RC planes and 'copters but its also great for any kind of microcontroller or electronics project that runs off of 5V. We tried a half dozen different 'BECs and found this one to be the best in terms of range and stability. You can check the technical tab for the analysis of input/output range and current draw.
To use, connect 6V up to 16V (recommended) to the IN-side wires (the bare wires) and 5V will be generated on the OUT-side wires (the pin header).
You'll get 5V (+-5%) regulated output from a higher voltage input. 3A output current, 5A peak - if you're trying to draw 3A you'll need to give it a little more than 6V though, 7V works well. The UBEC has built-in filter capacitors on the input and output, but it's a switching supply so it's a little noisy compared to a linear regulator.
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