{"title":"Gravity: DC Micro Metal Gear Motor w/Driver - 75:1","handle":"gravity-dc-micro-metal-gear-motor-w-driver-75-1","url":"/products/gravity-dc-micro-metal-gear-motor-w-driver-75-1","description":"A compact DC micro metal gear motor with a built-in driver that uses the DFRobot Gravity 3-pin interface. Simply connect to a microcontroller and control direction and speed with a single PWM signal — no external H-bridge required.\n\nThe embedded driver accepts standard servo-style PPM signals, so you can use the Arduino Servo library to control forward/reverse direction and speed. The motor features a 75:1 gear reduction ratio and draws less than 1 mA in standby when no control signal is present.\n\nKey Features\n\n\nBuilt-In Driver – No external H-bridge needed, single signal control\n\nGravity 3-Pin Interface – Simple plug-and-play connection\n\n75:1 Gear Ratio – High torque from a compact motor\n\nForward/Reverse Control – Via PPM pulse width\n\nSpeed Control via PWM – Variable speed in both directions\n\nLow Standby Current – Less than 1 mA without signal input\n\nArduino Servo Library Compatible – Supports up to 12 motors on most boards, 48 on Mega\n\n\nSpecifications\n\n\nOperating Voltage: 3.5–8 V\n\nReduction Ratio: 75:1\n\nNo-Load Current: ~40 mA @ 6 V\n\nStatic Current: < 1 mA (no signal)\n\nInterface: Gravity 3-Pin\n\nPPM Signal Resolution: 1 µs\n\nPPM Pulse Width Range: 500–2500 µs\n\nClockwise: 500–1400 µs (500 µs = max speed)\n\nStop Range: 1400–1600 µs\n\nAnticlockwise: 1600–2500 µs (2500 µs = max speed)\n\nPWM Frequency: 500 Hz\n\n\n\nNote: The embedded control chip consumes a small amount of the input voltage, so actual motor speed will be slightly lower than the rated speed.\n\n\nIdeal For\n\nSmall robotics and DIY motorised projects\nBeginners learning motor control\nCompact mechanisms requiring forward/reverse drive\n\n\nPackage Contents\n\n1× DC Micro Metal Gear Motor w/Driver (75:1)\n1× Gravity 3-Pin Cable\n\n\nResources\n\nProduct Wiki\nDimension Drawing (PDF)\nArduino Servo Library Reference\n","vendor":"DFRobot","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":13527,"title":"Default Title","sku":"DF-DFR0399","price":21.94,"on_sale":false,"in_stock":true,"available_quantity":193,"option1":"Default Title"}]}