Seeeduino V2.21 (ATmega168P)

Seeeduino V2.21 (ATmega168P) — Seeed Studio — 102010013

Arduino Diecimila-compatible board using ATmega168P in SMD packaging. Pin-layout, screw holes, and dimensions match Diecimila; fully compatible with existing shields and sketches.

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USB · 3.3 V

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Specialists: Teensy for high-clock audio and USB, Adafruit SAMD boards running CircuitPython or the Arduino IDE, proper STM32 eval kits, and the micro:bit classroom ecosystem. Schematik builds target ESP32, Arduino Uno, and Pico; come here when you have a specific reason to.

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