In this video, electrical engineer Barron Stone demonstrates his solution to the camera flash challenge, walking you through his thought process from start to finish and discussing the trade-offs between different approaches along the way.
- This was my thought process…for solving the challenge.…I began by considering the first requirement…to select a resistor value that…would charge the capacitor as quickly as possible…while also limiting the amount of…current from the battery to be 15 milliamps or less.…I know that the voltage across the resistor…will change as the capacitor charges.…Initially when the voltage across the capacitor…is zero, the resistor will have nine volts across it.…Then as the capacitor charges…and its voltage increases, the voltage…across the resistor will decrease…until it reaches zero.…
Since the largest voltage across the resistor…will be nine volts, I used Ohm's Law…to find a resistor value that would allow…a current of 15 milliamps…which gave me a resistance of 600 ohms.…That's not a standard resistor value,…so I rounded up to 680 ohms because…I have a resistor with that value…in my box of parts.…Substituting that back into Ohm's Law…shows me that the circuit will draw…a maximum of 13.2 milliamps of current…from the battery when the capacitor…
- Reading electrical schematics
- Building circuits on breadboards
- Reviewing types of static and variable resistors
- Reading resistor color codes
- Measuring resistance with a DMM
- Measuring resistive sensors with an Arduino microcontroller
- Making electrical signal measurements with an oscilloscope
- Measuring AC voltage with a DMM
- Understanding the time domain and frequency domain
- Designing passive low-pass and high-pass filters
- Reviewing reactive RC and RL circuits
- The relationship between capacitors and inductors
Skill Level Beginner
Learning to use MakerBot 3D Printerswith Kacie Hultgren1h 5m Appropriate for all
Learning Arduino: Pulse Width Modulationwith Rae Hoyt1h 16m Intermediate
1. Building Circuits
Read electrical schematics6m 25s
3. Resistive Circuits
4. Oscilloscope Measurements
6. Alternating Current
7. Electrical Signals
8. Reactive Circuits
- Mark as unwatched
- Mark all as unwatched
Are you sure you want to mark all the videos in this course as unwatched?
This will not affect your course history, your reports, or your certificates of completion for this course.Cancel
Take notes with your new membership!
Type in the entry box, then click Enter to save your note.
1:30Press on any video thumbnail to jump immediately to the timecode shown.
Notes are saved with you account but can also be exported as plain text, MS Word, PDF, Google Doc, or Evernote.