Join Barron Stone for an in-depth discussion in this video ✓ Challenge: Motor control, part of Electronics Foundations: Semiconductor Devices.
(thoughtful music)…- [Instructor] It's time for another challenge.…This is your chance to practice…using bipolar junction transistors…as switches to control an electric motor.…A simple brushless DC motor can spin clockwise…or counterclockwise depending on the polarity…of the supply voltage…and the direction of the current through it.…If the motor is being controlled…by a basic high side or low side switch,…that switch can only turn the motor on or off,…but it can't change the orientation…of the voltage or current…to control the motor's direction.…
In many applications,…such as when working with robotics,…motors need to turn in both the clockwise…and counter clockwise direction…to move back and forth,…and to control motors to do that…it's common to use a configuration…of four transistors called an H bridge.…The H bridge gets its name…because the circuit resembles…the capitol letter H.…It consists of two NPN…and two PNP transistors…positioned around the motor as shown here.…Except that on this diagram…the transistor symbols are missing their arrows…
- Semiconductor materials
- Diode applications
- Rectifying a signal
- Detecting the signal peak
- Protecting against large signals, reverse current, and flyback voltage
- Special purpose zener diodes, Schottky diodes, and photodiodes
- NPN and PNP bipolar junction transistors
- Using a BJT as a switch
- Field effect transistors
- Differences between BJTs and MOSFETs
- Operational amplifiers
- Op-amp applications
- Comparing signals
- Buffering signals
- Amplifying signals
- Filtering signals
- Combining signals
Skill Level Intermediate
Learning to use MakerBot 3D Printerswith Kacie Hultgren1h 5m Appropriate for all
2. Diode Applications
3. Special Purpose Diodes
4. Bipolar Junction Transistors
5. Transistor Applications
6. Field Effect Transistors
7. Operational Amplifiers
Feedback circuits6m 30s
8. Op-Amp Applications
Next steps1m 9s
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