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  1. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    because in the example I have it shows me how to derive the dBm from a starting point p, and p is in milli-watts but in the question at the end of the video it asks to add p1 to p2 and their units are dBm
  2. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    so I have a question if: p1 = 10dBm p2 = 5dBm can you talk me through how to add them please!?
  3. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    Ok back to basics how do gain in decibels relate the the Narrow (Single Frequency) Band Pass. how do I decide how many dB (how much gain) or change in amplitude and why? Say I picked an arbitrary number, change amplitude by 10, the gain in dB is equal to 20dB, I bought an online electronics...
  4. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    Next question what qualifies for low frequency and high frequency? cheers!
  5. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    So is it like 1.2pF 1.2nF 1.2uF 1.2F etc
  6. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    E-24 Resistor / Capacitor Values 1.0, 1.1, 1.2, 1.3, 1.5, 1.6, 1.8, 2.0, 2.2, 2.4, 2.7, 3.0, 3.3, 3.6, 3.9, 4.3, 4.7, 5.1, 5.6, 6.2, 6.8, 7.5, 8.2, and 9.1; multiplied by the decade value. Might sound silly but I have to check what is meant by "multiplied by the decade value."? can you do me a...
  7. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    What is a decade? "This process is followed through for all the values in a decade," and also, just to make sure, are the capacitor standard values the same digits as the resistors
  8. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    cool, is it a question of precision? fro what I understand E96 has 1% tolerance and are for precision electronics, is this true?
  9. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    Ok so I now want to know what does E-12, E24, E96 mean from the filter design in thirty seconds pdf because it says "(pick a standard value from Appendix A)." in section 4 Narrow (Single Frequency) Band Pass Filter, many thanks
  10. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    ok so from the filter design in thirty seconds I think what I need is the "Figure 3. Narrow (Single Frequency) Band Pass" confirm if correct
  11. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    can you tell me how the 1 dB is relevent please?
  12. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    thanks I'm uploading what I have done today, the low pass filter when it reaches 20kHz the decibels go to 1 dB and the high pass filter when it reaches 20Hz the decibels go to one again, I think this is significant why do we try to aim for 1 dB
  13. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    ok I've followed a video and I get to this point I don't understand what the graph shows, what dB is or why at 20kHz it's equal to 1dB from 4dB I need a bit of a nudge and a clear explaination of whats going on here I understand that this is a low pass filter
  14. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    ok is anybody available to talk me through the process on the site for example 32Hz range please?
  15. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    Thank you hararld kapp. Should I be looking at high pass filters or low pass filters or even bandpass filter? that site seems incredible by the way Ok I'm going bandpass!
  16. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    So I've come up with an Idea, if someone can tell me how to make a filter for say the 32Hz band and make it step by step, so that I can follow it like instructions or a template, then I can do the same process for the other 19 bands!
  17. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    I'm a total novice when it comes to this, I'm designing a Spectrum Analiser 20 columns wide and 30 rows up and have worked out a small portion with the use of LM3914 to represent a column, I need to know how to activate the band thats lighting up and how to filter from the left 32Hz to the right...
  18. Maglatron

    help with IR2110 chips

    what have I learnt in particular? what thing made you say that I'm learning? cheers
  19. Maglatron

    help with IR2110 chips

    Ok yes I am learning, I've found out that I can test the output power of the coils and rectifier and capacitor bank by putting in a resistor inline with the positive and negative finding the voltage it drops to and squaring that and dividing by the resistance itself then I have the power out I'm...
  20. Maglatron

    help with IR2110 chips

    not fishing for compliments but You have come a long way in your project what did you mean by that please?
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