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This expansion board is specially designed for PWM servos. On-board STC8G1K08A chip, without writing any programs, can control the servos in different ways by connecting to the power supply. The first method: adjusting the adjustable knob to control the servo; the second method: control the servo to enter different state modes by pressing the button. Users can power it through two 3.7V batteries or a Micro USB data cable, which is convenient and easy to carry. Makers and DIY enthusiasts should not miss this servo control board.

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