DC Motor Controller using Relay and MOSFET – Arduino Interface

DC Motor Controller using Relay and MOSFET – Arduino Interface

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The project presented here is a low-cost solution to control high-power brushed DC motor speed and direction. Traditional DC motor controllers are based on solid-state circuitry known as H-Bridge. Here we have made an H-bridge configuration using high current 2 x relays which can handle high voltage as well as high current. Additional MOSFETs are used to control the speed of the motor. These MOSFETs can be removed in case of only direction control is required, short the Drain and source pin of MOSFETs. The project requires 3 control input signals, all inputs are optically isolated to prevent noise and high voltage going into logic circuitry. A large-size heatsink is a must on MOSFET.

DC Motor Controller using Relay and MOSFET – Arduino Interface – [Link]

Mike is the founder and editor of Electronics-Lab.com, an electronics engineering community/news and project sharing platform. He studied Electronics and Physics and enjoys everything that has moving electrons and fun. His interests lying on solar cells, microcontrollers and switchmode power supplies. Feel free to reach him for feedback, random tips or just to say hello :-)

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