Search results

Search Forums New Posts
  1. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    thanks you, turns out I do use a bypass capacitor 100nF cheers!
  2. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    found it!!! so now I just have to crack on with it
  3. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    I have it all designed now, for the first column, on paper, just got to port it over to the proto board and get it soldered up and so I have the (pre-amp, amp, filter No1, envelope detector, buffer, REF gnd circuits and the LM3914 bar graph display drivers)
  4. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    so I can't seem to find where it says to mitigate the pot also in doing so, do I still put the REF in where the pot is removed or delete that too? thanks literally last question :) I'm working on it later today!!
  5. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    yes I've designed in the buffer aswell, after the envelope detector but before the rx resistor using the 4th op-amp out of the four in one TL074, the other 3 for the filter, got it remove the pot and use 1k resistor after the buffer thanks for pointing me to the right post!
  6. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    what should the value of rx resistor be? thanks
  7. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    I think that I do have to, I've got a whisp of a memory that says that it's the right thing to do but just checking. Will it harm it if I try without? thanks
  8. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    just to confirm, do I put a 100nf cap over the +VCC and -VCC of the TL074 chips? thanks
  9. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    so I have all of the circuits designed on paper (pre-amp, amp, first filter, referance gnd, envelope detector, and the bar graph LED drivers) for one column and am going to make a start next chance probably tomorrow! I'll keep you guys updated! thanks
  10. Maglatron

    Trolling

    ok thanks I think!
  11. Maglatron

    Trolling

    you guys are not talking about me are you? I am not a troll!
  12. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    found it!!! thanks
  13. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    so ok I think I asked this before can the reference ground circuits be enough for four entire filters or just four op-amps in each of the filters? thanks, I think it was last said that the reference ground circuits would be good for four entire filters but just clarifying
  14. Maglatron

    Temperature sensor over I2C not working using STM32nucleo64 microcontroller

    oh yeah and welcome to the forum Mr Irclarke90!!! I know it's cheating but if you use chatgpt (free to sign up) tell it what components you have and what microcontroller you using and the sensors and everything and ask it to write the code for you! it's very good! I use arduinos and it's very...
  15. Maglatron

    Temperature sensor over I2C not working using STM32nucleo64 microcontroller

    put it like this but in regards to your question I got no idea: #include "mbed.h" // I2C pins #define SDA_PIN PB_9 #define SCL_PIN PB_8 // UART pins #define TX_PIN PA_2 #define RX_PIN PA_3 // Define BufferedSerial object BufferedSerial pc(TX_PIN, RX_PIN); // Define I2C object I2C i2c(SDA_PIN...
  16. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    I disagree I think it's more than possible to build the circuits on proto board and that's what I'm doing, I'll get pictures! I misunderstood yes you know it can be constructed on proto!
  17. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    ok getting to it, printing out proto board on paper, and going to make the layout of the circuits, and will make a channel work, I am working on it, I will show results soon!! thanks and I appreciate that it's taking a long time, like I said before, I got side tracked into something else for a while
  18. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    looks complete now with a couple of adjustments to get it in the 2.4volt range with trial and error on the R23 resistor and I'll crack on!! thanks everyone!! seems to be 0.8meg!
  19. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    yes I took notes when reading it back through it on paper and I'm getting there it was a couple of months back will remember to take notes in future!!! thanks
  20. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    ok getting somewhere I changed the R23 resistor to 1meg and on the 7000Hz circuit the signal reaches 8.7v at the top and 6 at the bottom so this is good, now waiting for the program to run and I will screen shot it and do the same for the 45Hz one too! running the 45Hz now... and it reaches...
Top