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Amazon.com: SB New Motorshield for Raspberry Pi 3,2,1 and Zero This Expansion Board can Control up to 4 Motors or 2 Stepper Motor, 2 IR sensors and a Single ultrasonic Sensor. : Electronics
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I2C Shield for Raspberry Pi 4, Pi 3, & Pi 2 with Outward Facing I2C Port Terminates over HDMI Port - store.ncd.io
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Amazon.com: Geekworm Raspberry Pi 4 UPS, X703 V1.2 18650 UPS Shield with Auto Power On Function for Raspberry Pi 4 Model B Only(Support one 18650 Battery) : Electronics
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I2C Shield for Raspberry Pi 4, Pi 3, & Pi 2 with Outward Facing I2C Port Terminates over HDMI Port - store.ncd.io
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