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border-radius:8px} Battery Holder 3×AA with switch
4 MB flash: Room for full firmware + OTA updates
7V (input voltage DC 5V) Flow Rate Range 1~ 5L/min Working Voltage DC 5V~24V Mini
Arduino-compatible ATmega328: Easy code reuse for many projects
DFRobot Mega Sensor Shield V2.4 - Arduino Mega I/O Expansion dfr0165 border-radius:8px} Battery Holder 3×AA withAdd Reliable Mega Sensor Shield V2. 4 (Compatible with Arduino Mega) Sensing to Your Next Build Mega Sensor Shield V2. 4 (Compatible with Arduino Mega) Mega Sensor Shield V2. 4 expands an Arduino Mega style board with easier access to sensor pins, serial ports, wireless modules, and prototyping space. It is useful when your Mega project grows beyond simple jumper wiring and needs cleaner module access. Important: Use the official DFRobot links below
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