RC Low Pass Filter Explained (with Speaker Example)
HTML-код
- Опубликовано: 6 сен 2024
- In this video, I go over the concept of RC low pass filters. This includes the theory as well as the application. I go through the basic RC low pass filter circuit design, and go into detail about the components such as the capacitor and the resistor. I put the theory to the test by wiring up the filter to a speaker and an audio source. Hopefully, you have enjoyed the video! If you enjoy these types of videos then let me know! There is also more engineering videos on my channel already, so be sure to check those out too! :)
*MUSIC*
"Sneaky Snitch" Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0
creativecommons....
Music promoted by Audio Library • Sneaky Snitch - Kevin ...
Thank you so much man. I spent a long time trying to get a visual understanding of how an RC LPF worked, and this cleared it up immediately. Really appreciate it.
Glad it helped!
Thank you this is so helpful! I've been looking everywhere but couldn't find a straightforward explanation of what is actually going on at each step. This was so clear and made so much sense
I’m glad to help! Thanks for the nice comment!
I can understand that there was demonstration mistake
But the explanation was really cool for explaining "what if I do like this" solved my doubts.
You recieved a sub 💙
Thank you! I’m glad I can help you out! 😀
Hello! i have this problem in my car audio. This ripple current is going to my only one amp (7200watts), how to solve this problem? thanks!
I built a simple double filter. With two pots @ 50Kohm and two 47Mfd caps in both the lpf and hpf configs. I have a line level output from whatever going into that, then going to a vacuum tube amp that I also built for the mids/highs from the hpf. Then the other to a powered ss subwoofer. Its mono with the stereo channels together. I can tweak how much treble and bass gets split. The tube amp is just a small 6at6 and 6v6 mono amp. Im impressed! Someday ill build a stereo version of this in a proper cabinet. Or if I'm really brave, a push pull stereo amp.
Yeah, there is an error in this video when it comes to the speaker demonstration. The RC filter is preassumed that there is no load at the output. So when I hooked up the 8 ohm speaker, that is a low impedance device, so it would have affected the cutoff frequency. What I should have done was put a buffer (op amp or voltage follower) between the filter and speaker to get that high impedance that the model shows. The theory is correct; the application is wrong. I'm also dumb.
Okay so I just bought resistors and capaxitors for a RC low pass filter calculator online ,,
small 30 watt mono class d amp , want filter to go between amp and sub , using a 1.8K resister and a 270nF capacitor in parallel out to a 4 ohm sub ,, says it should cut off around 326 Hz. and I gonna have problems now ? thanks Bill
Nice Alex... I really liked your way of explanation and representation
Thanks I’m glad it helped!
I really hoped you'd get into why you can't just use an inductor and capacitor
Tq so much sir....this vedio helped me a lot to understand this concept..... to the point explantion without any stories
No problem
Thanks for the video! I will try this to dimminish that 1.5khz (i guess) noise of my arduino walkie talkie. When I TX, that noise occurs:(
@4:05 Thanks for that! Dudee! great video!
Thank you!
thank you
Welcome!
I'm just wondering, without the breadboard, how to I implement this? I have an 8" sub with a dead amp, but have it running off the rear surround channels. Just want to drop it to 850hz. cut out most the vocals. SO, I thought it would be best to inline the resistor on the +. Then just bridge the + and - on the speaker itself, with the capacitor.
Oh! Angular velocity is 2pif. Right. Excuse that. So it’s little omega (w) times C
Oh cool, black magic , thanks for sharing
wooo
Very great explanation.
Thanks!
It really would have been more helpful if you used a white noise signal to test rather than a sinusoidal wave.
good point
x is Z aka impedance
one thing that also confuses me...the node you speak of. is it an electrical component? does current just not go to the capacitor at all? what happens right there? I read path of least resistance is a myth. This is still by far the best explanation on youtube
The node is just the conection to the capacitor and resistor by a wire. Current does alternate in the capacitor since we have an A.C. voltage. You can think of the capacitor charging and discharging at the frequency of the voltage input. When it comes to A.C. circuits it's difficult to understand what is going on at a fundamental level. On a high level you can say, "oh, I see a resistor and capacitor; it might be filtering something." But if you want to know details, then in my opinion the best way is by doing the math, which requires good understanding of imaginary numbers or complex analysis. When it comes to electrical circuits, a lot of the times we only care about what goes in and what goes out. And once we have what we need, then we put in the missing pieces such as a capacitor and a resistor to get the desired output. I don't know you're level of understanding, but I recommend the book called The Art of Electronics. It covers a lot of theory as well as application.
I agree!
Intro is the best ever! Great video. Keep it up.
VERY EDUCATIVE. THANK YOU REGARDS
Great explanation
thanks! glad i can help ya out!!
Should the impedance rating of the speaker driver be taken into consideration with the frequency cutoff calculations? Does the speaker’s impedance become the resistor?
Yes it does, and it will change the R value in the 1/(2piRC) formula.
Very good explanation, thanks
Do i put rc filter on output of amplifier or input ?Thanks,great video.
Output. From the applications I’ve seen, you always amplify the signal first and then filter.
@@Alex-vi5kp Thanks alex.
I have an Egnater tube amp for guitars that is a little Bass Weak. It has a 3 band EQ but even with the bass cranked it’s weak. I thought I might get in there an change out the capacitor in the bass EQ section for one that is double in value... is that right? Or should it be halved :)
Amazing explanation.. Thanks :)
Glad to help!
What size of resistor would i use if i wanted to make a low watt sub woofer? Could you lay out the wire diagram on how that would look?Asking for a friend. :)
Thanks for this Video.
Can you provide me the software which you are using to drive the sound and info related to that?
Great video Alex, I learned a lot.
nice explaination
Thanks!
Dover Book Classic JP Den Hartog👍
Thank you alot!!!!!!!!!!!!!!
Glad to help!
Hey which one of the leads on input and output is positive and negetive?? Great vid btw
Digita - the top trace in the drawing is positive
It doesn't matter, because it's an AC circuit.
Thanks man
Had thought that was 2piwC
pls make a video on how lc circuit works??
I’ll add it to my list of upcoming videos! These videos do take some time to make unfortunately.
Alex yes indeed
Nice tutorial, can i have app name and link please , sound coward ???
here ya go www.zeitnitz.eu/scope_en
So ALLL those youtube videos showing just a capacitor as a low pass filer or claiming "Increased bass" are total BS!