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Learn how to create a simple heart rate monitor using an Arduino Pro Mini, PulseSensor, and OLED display. This beginner-friendly project is perfect for learning basic electronics, sensors, and ...
The split-style mechanical keyboard has an orthogonal key layout, with transparent keycaps containing 0.42-inch diagonal 72x40 OLED displays. The PolyKybd also has two small OLED status displays ...
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