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mini 600MA High Efficiency Low Quiescent Current 1-5V 3V 3.3V to 5V DC DC Boost DC DC Converter Module for Arduino UNO MEGA2560 [DD0405MA_5V] - USD $1.89 : canton-electronics.com
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10PCS Lot Mini 4-Channel Motor Drive Shield Expansion Board L293D Module High Voltage Current for Arduino UNO MEGA 2560: Amazon.com: Industrial & Scientific
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