Search results

Search Forums New Posts
  1. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    Can you recommend a rail to rail single supply op-amp quad in a dip package that would work for my application?
  2. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    I see what you are saying now # I've bought the TL074's now though
  3. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    Or even better, could you do a mock up of an asi file for LTspice, that would be exellent and so cool, so what I need is 12v to ground to -12v, for powering the op-amps, could you do that for me please???!!!
  4. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    can you point me to any videos on voltage inverters of switched capacitor type or a switch mode inductor based one please.
  5. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    So there is a lot of information to take in, and I don't understand it all, I found this in the datasheet though! do you just connect the pins 9 to ground for cascaded bar graph mode?
  6. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    Reading the datasheet again now!
  7. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    ok nice one just trying to keep the power usage down Not very good at reading the datasheets yet, BUT I am getting better!
  8. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    so my next question is, if I have a 12v battery and some LM7805's can you make positive-ground-negative with it, if you get my drift?
  9. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    fantastic so in the filter image of the tool that helps design filters, is that set correctly?
  10. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    so if pin 4 Rio is 0 Volts and pin 6 Rhi is 5 Volts, no leds will show with pin 5 at 0 Volts and all leds will show when pin 5 is at 5 Volts? is this good?
  11. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    Oh i see so if I set 4 low (Rlo) and 6 high (Rhi), then the voltage to turn on one LED at a low voltage, but will illuminate them all - at rellatively high voltage ie 1v lights 1 LED and 9 volt lights 20 LED or if you set the pins closer then the number 1 LED would turn on at 2v, and then light...
  12. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    example?
  13. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    so I need to know how much power to put into the op-amps (positive and negative voltage) to be sufficient on the output to drive the LM3914's?
  14. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    got my TL074's today, waiting on LM3914's got the bar graph LED's
  15. Maglatron

    help with IR2110 chips

    I took photos but I have to be aurthorized to have them so hopefully tomorrow now :(
  16. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    I'm knocking off for the night, night
  17. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    To be honest I don't understand ref adj does reference adjacent control the sensitivity of the voltage in, to turn on the LED's say it needs 12v in to get full brightness does it change it so all the LED's can be turned on with say 5v
  18. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    to me this says 12.5/(desired) I-led = R1 no? and ground pin 8!
  19. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    ok what would you do for 3 milliamps?
  20. Maglatron

    help with IR2110 chips

    finished it!!
Top