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  1. Arouse1973

    Protection circuit for Li-ion batteries

    What point on the circuit are you measuring that?
  2. Arouse1973

    Protection circuit for Li-ion batteries

    It looks like he has added a buffer 0.5 Volts per cell. To achieve the maximum capacity of the battery each cell can be discharged down to 2.5 volts. Adam
  3. Arouse1973

    Protection circuit for Li-ion batteries

    Yes try reducing the value of the base resistor, put a 1K across the existing base resistor and try that. How much current does the circuit draw when fully on? Adam
  4. Arouse1973

    Adjustable Schmitt Trigger Circuit Help

    Ok I see what you mean now. Thanks Adam
  5. Arouse1973

    Protection circuit for Li-ion batteries

    Its most likely transistor gain. Adam
  6. Arouse1973

    Adjustable Schmitt Trigger Circuit Help

    Interested Steve, what will the FF do? Adam
  7. Arouse1973

    Protection circuit for Li-ion batteries

    Its going to have to be really low drop to output 3.3 Volts at 3 Volts in :) My guess is it being a pass device, below regulation voltage vin is approx vout. Adam
  8. Arouse1973

    Protection circuit for Li-ion batteries

    The label VBAT, is this from your battery? If it is then the regulator will stop working when the input voltage reaches it's lower limit, what ever that is, you don't say what your using. How much current does your sensor draw? Adam
  9. Arouse1973

    A three phase H-bridge

    The MOSFET drivers are the interface to the micro. You don't need the BJTs if you drive the circuit how the data sheet tells you. How much delay do you have in your software between turning one MOSFET on and the other off? Edit: I am pretty sure the waveforms are showing shoot through which is...
  10. Arouse1973

    How do i know if i can upgrade my graphics card to X graphics card?

    Jerid you know more about this sort of thing than anyone I have met. You will be fine. Its all German to me, sorry Harald :) Adam
  11. Arouse1973

    Anyone made a sound card oscilloscope?

    Thats great, feels good to know its what you have built. Adam
  12. Arouse1973

    How do i know if i can upgrade my graphics card to X graphics card?

    Thats one for @Gryd3 Adam
  13. Arouse1973

    Energy Monitoring (Formulas and methods help)

    Any energy you use to make the measurment will result in errors. If you can account for all errors then thats fine. Adam
  14. Arouse1973

    Energy Monitoring (Formulas and methods help)

    The most accurate way I can think of is to use RMS thermal measurements. Measuring the temperature of a known resistance. Adam
  15. Arouse1973

    Energy Monitoring (Formulas and methods help)

    What sort of current are we talking? Adam
  16. Arouse1973

    Energy Monitoring (Formulas and methods help)

    Hi Jerid Are we talking direct measurements of the mains voltages and currents? Adam
  17. Arouse1973

    A three phase H-bridge

    Was there a reason you did it that way? Adam
  18. Arouse1973

    A three phase H-bridge

    Hello Why have you not followed the data sheet for the drivers? You drive two N-Channel MOSFETs straight from the drivers and not through BJTs. Adam
  19. Arouse1973

    Anyone made a sound card oscilloscope?

    Your doing a good job Robert, you'll be teaching me soon. Adam
  20. Arouse1973

    Anyone made a sound card oscilloscope?

    Yep my old boss said the person that makes no mistakes is the person doing nothing. At the moment I am doing a PCB design for a vehicle TURBO cut out, replying to EP threads and replying to emails from a friend who needs some electronics help... so busy :) Adam
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