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Appendix B. Raspberry Pi ports and legacy boards - Hello Raspberry Pi!: Python programming for kids and other beginners
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Amazon.com: GeeekPi Raspberry Pi 4 8GB Kit - 64GB Edition, DeskPi Lite Raspberry Pi 4 Case with Power Button/Heatsink with PWM Fan, QC3.0 Power Supply, HDMI Cable, Card Reader for Raspberry Pi
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I2C Shield for Raspberry Pi 4, Pi 3, & Pi 2 with Outward Facing I2C Port Terminates over HDMI Port - IoT Devices & Sensors | Relay Controllers, Current Monitoring & Vibration Sensors
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