From the course: Electronics Foundations: Semiconductor Devices

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Solution: Motor control

Solution: Motor control

From the course: Electronics Foundations: Semiconductor Devices

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Solution: Motor control

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(upbeat music) - [Instructor] Let's take a look at my solution for the challenge to design the H-bridge circuit to control a DC motor. I began by thinking about whether each of the transistors would be acting as a high side switch or a low side switch connected to the motor. The top two transistors are both acting as high side switches because they're connected to the five volt power source and they control whether or not current flows down to the motor that's connected below them. I use PNP transistors to create a high side switch. So both of those top two transistors will be PNP. The same logic applies to the bottom two transistors. They're both serving as low side switches because they're connected between the motor and ground. And since I use NPN transistors to create low side switches, both of the bottom transistors will be NPN. Now I need to figure out how to orient each of these transistors. Since the top two…

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