I've controlled a motor going one direction using only one transistor. With an H Bridge, I can make a motor go forward, backward and brake. Does an H Bridge have only three transistors inside it to perform these functions, or does it take a larger number?
closed as off-topic by jfpoilpret, fuenfundachtzig, Nick Gammon♦, Anonymous Penguin Jul 20 '15 at 0:22
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The absolute minimum number of transistors in a H bridge is 4 (one in each leg of the "H" and the motor in the middle), but there may be more depending on what voltage and control scheme is desired.