In this video, electrical engineer Barron Stone challenges learners to use their knowledge of capacitors and resistors, to create an RC circuit to power a camera flash. Choose resistor and capacitor values to quickly charge a capacitor from a battery, and
- [Instructor] It's time for another challenge problem!…This time, you'll be designing the circuit…for a camera flash.…Cameras rely on the ability of capacitors…to quickly discharge,…providing that short burst of high energy…that powers the flash bulb.…The battery in this camera…can't directly provide energy fast enough…to produce the voltage and current…necessary to power the flash bulb.…So instead, the battery is used to solely charge a capacitor…and then when I take a picture,…that capacitor rapidly releases it's stored energy…to make a flash.…
The capacitors used in cameras…operate at dangerously high voltages…and you should never take apart a camera flash…because there's a real danger of getting shocked.…So, for the sake of safety in this challenge,…I've created this circuit,…which mimics the behavior of a camera flash,…but at much lower and safer voltages.…When the two-way switch in the circuit…is flipped to the left,…it'll connect the capacitor in the middle…to a nine volt battery,…and current will flow through the resistor…
- 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
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