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Amazon.com: CQRobot Speaker 5 Watt 8 Ohm Compatible with Arduino Motherboard, JST-PH2.0 Interface. It is Ideal for a Variety of Small Electronic Projects. : Everything Else
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I built an arduino based thermometer inside the enclosure of a broken bluetooth speaker : r/electronics
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Amazon.com: ZK-XPS 150W+150W Bluetooth Power Amplifier Board with TDA7498E Chip 2.0 Channel, DC12-32V Audio Power Amplifier Module for DIY Bluetooth Speaker : Electronics
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