An
H-
bridge is built of four switches that
control the flow of
current to a load. ... If you close switch 1 and switch 4, the
current will flow from the source, through switch 1, and then through the load, then through switch 4, and then back to the load. An
H-
bridge circuit with S2 and S3 closed.
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H-Bridge DC Motor Control
An H-Bridge circuit contains four switching elements, transistors or MOSFETs, with the motor at the center forming an H-like configuration. By activating two particular switches at the same time we can change the direction of the current flow, thus change the rotation direction of the motor.
