USD 9.95
Your power supply problems are now fixed! This little circuit board may look small but inside is a high-efficiency DC/DC step-down converter that can output up to 3 amps at 5V without the need of any heat-sink or forced cooling. (It will get hot 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 it's also great for a variety of microcontrollers or electronics project that runs with 5V. Adafruit has tried a half dozen different UBECs 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 and 5V will be generated on the OUT-side wires. You'll get 5V (±5%) regulated output from 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. There is a label on the clear heat shrink around the circuit board for the UBEC. The IN side (provide 7V-12V) is the open wires and the out (supplies 5V) is the black 3 pin female connector.
You could save on Jameco Electronics UBEC DC/DC Step-Down (Buck) Converter 5V 3A Output with a Jameco Electronics promo code:
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worked 7 months ago