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  1. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    ok cool
  2. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    Nice one bertus, can you have one wav file of 45hz with varying ampitude for say a minute? I will read now!
  3. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    I just skimmed through there is nothing with frequecy
  4. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    Something just occured to me, can you simulate a 45hz signal that varies in amplitude in spice, I'm sure you can, then how do you do that?
  5. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    okie doekey will do!!
  6. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    I found this for RC selection with known carrier frequency and base frequency what are the differences between the two
  7. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    ok thats fine it said precision envelope detector can you recommend a setup please will that be generic for all the filters perhaps a good youtube video maybe
  8. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    in this envelpe detector are the cap values in uf
  9. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    I took the plunge and bought them!
  10. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    will film type do??? cheers
  11. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    so I added some up on mouser, and chose the capacitors as film type they come to £130.50 Is that too much???
  12. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    Hello, I'm back awake:) could you tell me which type of capacitors that I need to buy please, for the filter circuits?
  13. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    any way protoboard (not strip kind) has 1944 holes so more than enough 100mm x 150mm
  14. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    probably a really stupid question but do I need the 12v for power still? I think yes but just to clarify! nevermind, it was stupid, of course it does!!
  15. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    Thank you Dana, I will get round to learning that too, I'm tired right now, it's been a looong day!!
  16. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    ok thank you for the tip because it has taken me litteraly hours to get the resistor valuse from E12 mixes I'm hoping that I don't need to mix capacitor values too I need to know which type of capacitor to use do you know what would work this project is big because the doubled up resistors and...
  17. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

  18. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    I'm on mouser and the values are there what type am I looking for?
  19. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    Hello I have read your reply and will return to it I'm concentrating on this part as of now capacitors values and which types to get perhaps I can buy a pack with all of the valuse needed, I really don't want to be mixing values? all values are in nF 100 x20 91 x2 82 x2...
  20. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    so im going to print out 32 blank (0 value) of the op-amps and label them with pen and paper, the first set of 16 no gain and the second set of 16 with 3dB gain (x2) I've run out of solder for the minute but getting some soon and am going to get to work asap on the filters the LM3914's should...
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