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  1. Maglatron

    Spectrum analyser Equalizer project how to go about it?

    so we light up each row individually and one after the other, but we go thru the rows so fast that our eyes do not notice, and just see a static complete picture
  2. Maglatron

    Spectrum analyser Equalizer project how to go about it?

    So say you wanted to light the LED's circled to light how would that be?
  3. Maglatron

    Spectrum analyser Equalizer project how to go about it?

    That's fantastic, thank you, but I don't understand fully, so why do you put digital pins into the transistors and why do you use the analog pins for rows?
  4. Maglatron

    Spectrum analyser Equalizer project how to go about it?

    any help?
  5. Maglatron

    Spectrum analyser Equalizer project how to go about it?

    ok so if I use shift registers do I still use the LM3914's, do you know of any youtube tutorials that can help? and any shift registers, I'm a little confused tbh can you give a more in depth instruction please? I'm not too bothered about how I achieve this for my project just that it works!
  6. Maglatron

    Spectrum analyser Equalizer project how to go about it?

    so I think the code is fine, I should use the LM3914 and the pwm pins of the esp32 dev board (there are 16) each pin to represent a column and band width and set the max signal of the LM3914to 5V so that means that when the signal is at 5v, all the LED's in that column would lit. so I have this...
  7. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    Just trying to navigate the maze
  8. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    ok thanks I would be using 3.5 jack >> filter >> LM3914 can you explain step one and I can work it out from there I think?, do you think that it's a good idea to control LM3914's columns with PWM from and esp32, if so how do you think I should go about it? the filters are omitted if I use that...
  9. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    what is the chain?
  10. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    https://github.com/s-marley/ESP32_FFT_VU
  11. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    so I think the code is fine, I should use the LM3914 and the pwm pins of the esp32 dev board (there are 16) each pin to represent a column and band width and set the max signal of the LM3914to 5V so that means that when the signal is at 5v, all the LED's in that column would lit. so I have this...
  12. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    I have posted in my other thread because I was advised to, its the spectrum analizer one please have a look!
  13. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    is G the gain? what do I do with the R divider and whats the part about To the point, so you start at the end of the signal chain of waht you desire, and set max amplitude to 5V (trial setting from above) and work backward to figure out what G you need each element in chain to get to that. how...
  14. Maglatron

    Spectrum analyser Equalizer project how to go about it?

    so I have this code and it compiled fine for the esp32 dev board and I'm not using WS2812B LED strip can you help me modify the code for my needs and explain please!? do I still use the LM3914 for the columns? is the first LED in matrix the bottom left? // (Heavily) adapted from...
  15. Maglatron

    Spectrum analyser Equalizer project how to go about it?

    Note you will have a huge breadboard, tons of wiring, if you do it this way for 30 channels if you use linear filters. A FFT approach can be done in one part, including LED drive, all filters (the FFT freq bins that occurs as FFT output). Just a thought. from dananak I don't understand how to...
  16. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    moving back to graphic equalizer thread!
  17. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    I want the frequencies coming from 3.5 jack not mic but thanks for the fantastic responce also how do you set Does that mean that the when at 5v then the 30 leds will light in each band?
  18. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    thanks
  19. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    well I want audio so I'm going to work out the equation that is in the pdf Narrow (Single Frequency) Band Pass what I was asking for is to know which capacitor to use!
  20. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    It has kind of lapped over because I need the band pass filter to control the LM3914 for the LED's in the spectrum analyzer
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