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This very small board (48x35 mm) provides simultaneously a power stage (70W) and a speed and position PID regulator for DC motors (with brushes and encoder).
The I2C bus, that is used as a communication protocol, allows to connect up to 127 boards on the same bus. When using this product with FiveCo's Ethernet to I2C converter FMod-TCP (DB) you can drive several motors through a single Ethernet cable !
The connection of the cards (see scheme) offers a complete and high precision system for positioning.