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
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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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