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  1. crutschow

    extra 10 volts why

    The average value of the rectified sinewave should be 0.637 of the peak value, not 0.636.
  2. crutschow

    extra 10 volts why

    A typical voltmeter will give the average DC voltage of the rectified sinewave, which is 0.636 of the peak sinewave voltage. When you add the capacitor, it charges up to the peak of the sinewave which is 1 / 0.636 = 1.57 of the average or 1.57 * 20V = 31V.
  3. crutschow

    Can We Weld With a Soldering Iron?

    And there's also Brazing.
  4. crutschow

    8 and 6 ohm speakers

    I you have 6 ohm speakers and the amp has a setting for 6 ohms, why are you trying to match the 8 ohm amp setting?
  5. crutschow

    8 and 6 ohm speakers

    With that, each speaker in parallel will output only 1/4 the audio power of the one in series.
  6. crutschow

    8 and 6 ohm speakers

    Repeating the same statement doesn't tell me what you did or how you connected the speakers. How do you expect answers if you don't give the details?
  7. crutschow

    Cat 6 Ethernet Cable data restriction?

    You might try a higher category cable such as 6a or 7.
  8. crutschow

    Solar Panel and 12V Deep Cycle Battery advice

    Delete
  9. crutschow

    8 and 6 ohm speakers

    Exactly what does "used what ever I needed" mean? Need details.
  10. crutschow

    Emergency cutoff for air compressor

    That would need to be put at the output of the hose.
  11. crutschow

    Cat 6 Ethernet Cable data restriction?

    Why? That can foul up the twisted pair connections, as noted by kellys_eye.
  12. crutschow

    Emergency cutoff for air compressor

    How much time before you want the compressor to stop?
  13. crutschow

    NPN reverse bias reading

    If it's a MOSFET, the gate-source and gate-collector should look like an open circuit.
  14. crutschow

    Comparator circuit analysis

    You get a big 2nd from me on that. :rolleyes:
  15. crutschow

    Subwoofer repair

    Why does that not surprise me?:rolleyes:
  16. crutschow

    Searching for a term

    Overvoltage circuits typically do that (often with an SCR) to protect a load from excess voltage.
  17. crutschow

    why 74hc inputs are high by default?

    Normal operation is to have the input driven high or low by an external signal, no pull-down resistors or inverters needed, so I don't understand your question. What's your definition of "normal"? If the input is not being used, than just tie it directly to ground or V+. The LTspice models...
  18. crutschow

    Faraday Cube

    As stated, you need some type of external antenna to listen to FM. How far away are the stations you want to listen to? Do you get good reception if you move the radio outside? What sort of antenna does the radio have now? Since you apparently have the internet, you might consider an internet...
  19. crutschow

    BJT Cascode Amplifier

    Start with the desired collector current and work from the bottom up. Think about how the circuit works. Hint: The collector current of Q1 is determined by Q1's emitter voltage across Re, and Q1's emitter voltage is determined by Q1's base voltage. Do you know what the typical Vbe of a BJT is...
  20. crutschow

    Modified sinewave to pretty good sinewave?

    Also can you provide the measured voltage at each step of the quasi-sinewave? I did some simulations for a 4-step quasi-sinewave with equal 1/3 voltage steps, and with 1/2 time at the peak and 1/4 time at each step (below). For the same RMS voltage value, the peak voltage of the quasi (green...
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