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PU CONNECTOR PLL 12 02 (12mm OD X 1 4″ BSPT Male Extended Elbow) RC522 RFID 13.56MHZ Reader Writer Module Power on the system and Power on the system and rotate the potentiometer knob to observe motor speed variation from zero to maximum velocity Connectivity Technology: GPIO PU CONNECTOR PLL 12 02 (12mm OD X 1 4″ BSPT Male Extended Elbow)
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