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  1. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    Mr Bertus maybe? you were good with this last time! I have refreshed myself with the details today but a little stuck, thanks last time you also changed the R12 from 42.2r to 42.2k aswell and I remember that making it work better!
  2. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    the filters are working in a fashion but don't produce much voltage change (less than 0.1 of a volt0 from what I understand they need to vary by 2.4volts! need some adjustments can you fix it ??
  3. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    look and see! if you can find fault! thanks
  4. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    so I have finnished reading the entire thead, I made a start I soldered the bar graph leds on but nothing else yet! kinda got side tracked with another project! I'm back to this now though! thanks! as you can see the 45Hz image uses a 15k resistor for R23 and the 7000Hz uses 820k I want the...
  5. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    I made a start I soldered the bar graph leds on but nothing else yet! kinda got side tracked with another project! I'm back to this now though! thanks!
  6. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    okay found it so now that that is changed to 10uF what should R23 be please? thanks!
  7. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    okay sorry for that! going through it now and im on page 12
  8. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    I can't find the post that told me that the value of the cap was wrong in the sim where you helped fix the design!
  9. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    I'm going to go and read back through the thread, see if I can find answers
  10. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    which ones are the coupling capacitors,? the ones in the filters that where wrong by uf and nf?
  11. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    ?? please can you recommend a resistor to use I'm going to get cracking
  12. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    to 15k? or lower,? thanks, what would you recommend?
  13. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    anyone, is 15k for R23 okay?
  14. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    I have a model where the resistor of the R23 is 50k so just wanted to know if the first thought of 15k will do? thanks, back on this part of the project till I have the parts for the maglatron 2.0 :)
  15. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    also I have a couple of these spice models, for R23 should it be 820k or 15k? thanks I think the image/shematic is correct with 15k
  16. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    just to clarify because not been concentrating on this project for a while, I know that I don't build the part in red, but do I build up untill after the 10uF C17 cap and this is where all of the filers are wired in? thanks going to get on with it very soon, I have been concentrating on the...
  17. Maglatron

    help with IR2110 chips

    ok so taking that into consideration? I am considering a strait 8cm radius to the centre should be fine!!
  18. Maglatron

    help with IR2110 chips

    I found the equation used before okay divide circumfrence by pi then half: 50 / 3.14 = diameter then half for 7.96cm radius thanks
  19. Maglatron

    help with IR2110 chips

    Hello, I've got a new flywheel and 20 magnets per side 2.5cm in diameter, what radius should I put them at so they fit snug? it's a simple equation but just forgotten it!
  20. Maglatron

    help with IR2110 chips

    yeah thanks for that Mr Martaine2005
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