Join Barron Stone for an in-depth discussion in this video ✓ Challenge: Circuit protection, part of Electronics Foundations: Semiconductor Devices.
(chiming music)…- [Instructor] Alright folks, it's time…for a challenge problem.…This is your chance to practice…using diodes to protect a circuit.…For this challenge, I want you to determine…how to use diodes to ensure that the thermostat…in my house remains powered.…I'm going to be going on vacation for a few days…and I'll be leaving my pet hamster at home alone.…So, I want to guarantee that the temperature in the house…will be comfortable for him while I'm gone.…In this scenario, it's critical that my thermostat…always has uninterrupted DC power.…
So, for redundancy, I've connected…two DC power supplies in parallel.…Each of these can individually power the thermostat.…So, if one supply fails, the other will pick up slack,…and my thermostat will never notice.…All electronic components have the potential…to fail and stop working.…And with my luck, it usually happens…at the worst possible time.…So, for critical applications like this,…I need to consider how my power supplies can possibly fail.…In general, they could fail in one of two ways.…
- 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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