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This RPI HAT (Hardware Attached on Top) will be connected to an existing Pi3b+. Assuming the worst case scenario, this RPI model is able to draw a maximum of 5.1W. The GPS module can draw 2.0W 1-2W summing to a total maximum power draw of 6.1W-7.1W.
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Above is the schematic for the RPI connection for the GPS HAT. Key pins are those not marked P#.
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