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  1. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    so I got a channel to work and nobody has even commended me for achieving this and wanted you all to know that talking me through it was not a waste of time! but thanks for spurring me on!! otherwise I don't think I'd have gotten this far!! the column/channel reacts to sound and moves up and...
  2. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    yay nay?
  3. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    anyway, I used the REF GND on the amp the filters and the two LM3914, how many more circuits can I use that REF GND for?? because I know you said that one REF GND would support four filters but with the LED bar graph drivers will one REF GND still support four filters and four sets of LM3914's...
  4. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    can I get a whoop whoop?!?!? :)
  5. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    HOORAY!! One column reacting to sound forgot to take pics of the soldering, also think I soldered the LED's in wrong because the light went from the ends to the middle so desoldered the top section of the LED's and then eyes got tired so didn't have chance to solder the top one back in, but here...
  6. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    do all chips have similar bypass cap value or does it matter which type of chip being used?
  7. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    thanks it's ok now!! thanks you for that very enlightening!
  8. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    my internet won't let me access the site! it's ok went through the search option on the site instead of the link I'm on it!
  9. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    I will take some more pics of my progress hopefully works well this time round all connections so far are good just need to make the buffer circuit out of the BAT43 diode and the 100nF cap and the 1meg resistor and the op amp wire it up and have a look and see, wish me luck!! oh yeah and what I...
  10. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    ok cool I put the caps real close the the power lines, thanks
  11. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    HAPPY EASTER!!! in this schematic there are effectivly two 10uF caps going from the negative to positive is this okay or should I just use one??!!!??
  12. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    ok cool, thats good to know! thanks
  13. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    Mr bertus perhaps you have a suggestion, thanks
  14. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    actually I'm not certain if I did or did not! I will do it next time round! thanks is there any way of seeing if the pre-amp and amp is working before proceeding to making the filter part for the first column LED cicuit?
  15. Maglatron

    Comedy Thread

    lol okay I'm giving up trying to be funny!
  16. Maglatron

    Comedy Thread

    I thought it were rather funny have you ever used WD-40, it loosen nuts and bolts, rusty stiff nuts and bolts ;)
  17. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    also tested the LM3914's with the positive and negative connected but the REF GND and signal not yet connected (because I've not re-made yet) but the good thing is they're not getting hot so that is a positive but thinking about making that circuit again because soldering wise it looks a...
  18. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    cool so tested the REF GND part of the circuit and its as sweet as a nut measureing exactly half the input voltage eyes were getting really tired at the end of that session almost like soldering in the dark still took pics for you!! the strangly yellow wire is the out put to the filter which I...
  19. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    for r21 can I use 510k?
  20. Maglatron

    Comedy Thread

    went to see a tribute band to UB-40 the other week, they were a bit rusty and stiff at the start but they got better with time you know what they were called? WD-40!
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