Instead of using a hardware low pass filter you can use a moving average, which is also a form of low pass filtering and can be used in a lot of cases. And you can use that with digital (I2C, SPI) sensors as well.
elementary analysis is OK to understand the principle. Like many things in electronics the results usually don't align with the such optimistic predictions. Every type of capacitor has a self-resonant frequency, Fr. In any filter , every capacitor slowly looses the ability to attenuate for input signal that contain unwanted high frequency elements. An 1 uf electrolytic capacitor does not function as expected at 1 Mhz . A 0.01uf ceramic should be connected in parallel the result is will GREATLY reduce 1mhz to 20 Mhz noise outputs of a filter.
great video man,but way above my head a little. the reason i'm watching it is because i got a cheap hantek automotive scope and it dont have filters like the better pico scopes . but really interested because we do a lot of current clamp measurements . and the screen gets real fuzzy without some filters, tried the .1 microfarad capacitor in series but i think i can apply your technology to make an adapter. thanks for the info.
+Dave there was no hard analytical way I came to 500hz. I simply chose a value that wouldn't attenuate 60hz (much) but would cut out higher frequency noise.
Why that circuit? Why not just a single resistor em series and a single cap in paralel connectec do the non inverting pin? EDIT: Because this way its second order, got it
Can't wait to see part 2. Really nice and instructable video! THANKS
Your video is an amazing eye opener man, I have been reading on the amazing resource of active filtering techniques and it is extremely well written.
Very well explained. These are somewhat tough topics to explain right. Thumbs up...PEACE
Instead of using a hardware low pass filter you can use a moving average, which is also a form of low pass filtering and can be used in a lot of cases. And you can use that with digital (I2C, SPI) sensors as well.
elementary analysis is OK to understand the principle.
Like many things in electronics the results usually don't align with the such optimistic predictions.
Every type of capacitor has a self-resonant frequency, Fr.
In any filter , every capacitor slowly looses the ability to attenuate for input signal that contain unwanted high frequency elements.
An 1 uf electrolytic capacitor does not function as expected at 1 Mhz . A 0.01uf ceramic should be connected in parallel the result is
will GREATLY reduce 1mhz to 20 Mhz noise outputs of a filter.
great video man,but way above my head a little. the reason i'm watching it is because i got a cheap hantek automotive scope and it dont have filters like the better pico scopes . but really interested because we do a lot of current clamp measurements . and the screen gets real fuzzy without some filters, tried the .1 microfarad capacitor in series but i think i can apply your technology to make an adapter. thanks for the info.
excellent! thanks again!
It Helped.............Thank You....
Could you explain me why you used fc = 500hz ?
+Dave there was no hard analytical way I came to 500hz. I simply chose a value that wouldn't attenuate 60hz (much) but would cut out higher frequency noise.
5:55
watch the video
Amazing! 👍🏻
Were is the document link?
Is the filter available for purchase?
Why that circuit? Why not just a single resistor em series and a single cap in paralel connectec do the non inverting pin?
EDIT: Because this way its second order, got it
Yes, also it serves as a buffer to the amplifier stage so there is a uniform input impedance
if you will give me an address to get there i and several people would but one.
L