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  1. crutschow

    4017 ?

    You could use four CD4053 triple two-input analog multiplexer switches at the 4017 outputs. Connect all the mux "x" inputs in 1-10 sequence and the mux "y" inputs in 10-1 sequence. Then use the 555 output to select either the "x" inputs or the "y" inputs to invert the sequence at the mux outputs.
  2. crutschow

    8 and 6 ohm speakers

    Can you tell us exactly how many and what speakers you have including their impedance rating, if you want some good answers, since the info you have provided so far makes that impossible.
  3. crutschow

    High voltage 12 volts applied to 5 volt Nixie clock - damage? Can it be fixed? ?

    If you get it working again you might want to add an input overvoltage crowbar circuit, or an ultra LDO input regulator to keep the internal voltage at no more than 5V.
  4. crutschow

    extra 10 volts why

    Below is an LTspice simulation of the two cases with a full-wave bridge: Note that with the capacitor, the output goes to about 30Vdc (green trace) and without, the average voltage is about 20V (red trace and Waveform window).
  5. crutschow

    extra 10 volts why

    Well, you never know...............
  6. crutschow

    extra 10 volts why

    The average value of the rectified sinewave should be 0.637 of the peak value, not 0.636.
  7. 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.
  8. crutschow

    Can We Weld With a Soldering Iron?

    And there's also Brazing.
  9. 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?
  10. 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.
  11. 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?
  12. crutschow

    Cat 6 Ethernet Cable data restriction?

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

    Solar Panel and 12V Deep Cycle Battery advice

    Delete
  14. crutschow

    8 and 6 ohm speakers

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

    Emergency cutoff for air compressor

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

    Cat 6 Ethernet Cable data restriction?

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

    Emergency cutoff for air compressor

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

    NPN reverse bias reading

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

    Comparator circuit analysis

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

    Subwoofer repair

    Why does that not surprise me?:rolleyes:
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