In this video, electrical engineer Barron Stone designs a passive RC low-pass filter to remove high-frequency energy from a signal while allowing low-frequency energy to pass through. Learn how to choose the right resistor and capacitor value for a first-
- [Host] A low-pass filter is a circuit…that attenuates or reduces any high-frequency…components of a signal, while allowing…the low-frequency components of a signal…to pass through.…One of the simplest low-pass filters…you can build is this RC circuit,…consisting of a resistor in series…with the output voltage and a capacitor…that's in parallel with the output.…For low-frequency inputs, the capacitor's impedance…will be very large.…
So the capacitor will block that low-frequency energy…from ever traveling down through it.…Since the low-frequency signals can't go through…the capacitor, the only place left for them to go…is through this filter circuit and out through…whatever load is attached to it.…The low-pass filter allows the low-frequency signals…to pass through it.…Now, when it gets a high-frequency input,…things are a little different.…The capacitor will have a much smaller impedance…for this high-frequency signal.…And it allows those to pass through it very easily.…
So any high-frequency energy will pass through 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
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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