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  1. AnalogKid

    RIFA PME 271M - there are so many!

    40: -40C ambient temperature worst case - larger number is better 085: +85C ambient temperature worst case- larger number is better 56: number of days of the damp heat test- larger number is better X2: insulation/application class. X2 is a medium-grade line-to-line filter capacitor...
  2. AnalogKid

    Maximum Voltage in passive capacitive circuit

    Doubtful.
  3. AnalogKid

    Maximum Voltage in passive capacitive circuit

    I think the intent of the original question was to stay focused on the behavior of ideal components, and not wander off into stray reactances, assembly techniques, phase of the moon, etc. ak
  4. AnalogKid

    Maximum Voltage in passive capacitive circuit

    I'll tell you I don't understand why that matters. There is nothing in post #1 about phase shift being part of the question or answer. also, *any* circuit with nothing but Rs and Cs will have phase shift. That's kind of a thing. The StackEx circuit and the single-stage version I described in...
  5. AnalogKid

    Maximum Voltage in passive capacitive circuit

    Ah, but in #3 I was not commenting on your circuit, which had not yet been posted. That is why I quoted the OP. ak
  6. AnalogKid

    Maximum Voltage in passive capacitive circuit

    Not sure how you can say that. I was winging a guess based on an incomplete, two-sentence description with no schematic. Based on only that, a string of resistors and capacitors and one transistor still sounds like a phase shift oscillator to me. ak
  7. AnalogKid

    Maximum Voltage in passive capacitive circuit

    If I understand the question correctly, then yes, it is. 5 V square wave, 50/50 duty cycle, 0 ohm source impedance, 1 kHz. positive pulse width = 500 us 0.1 uF capacitor and 1.667K resistor in series; time constant = 166 us Cap connected to square wave source, resistor tied to +5 V. The pulse...
  8. AnalogKid

    Maximum Voltage in passive capacitive circuit

    Sounds like a phase-shift oscillator. ak
  9. AnalogKid

    Wind Detecting Circuit

    Actually, steel will work just fine, and makes mounting and securing the magnets way easier. With all of the north or south poles facing outward, there still would be enough change in flux between them to be detected by a Hall sensor. Doesn't matter which pole is outward, as long as they're...
  10. AnalogKid

    Wind Detecting Circuit

    0.2 V is very low. How fast is the shaft turning for that voltage? Can you post images of the motor? Detecting very low wind speeds is difficult. Professional units that have vanes or cups driving a small generator have very low friction bearings. ak
  11. AnalogKid

    BCD to 7 segment display

    Indeed, a nice trick question.
  12. AnalogKid

    BCD to 7 segment display

    [Mod edit: Quote containing answer deleted] Note that the idea was to get him to figure that out for himself. ak
  13. AnalogKid

    BCD to 7 segment display

    I had a longer response, and erased it. As above, read the datasheet. ak
  14. AnalogKid

    about cable gauge

    10 cm is only 2.5% of the 40 m round trip distance, so right off the top it will not have a huge impact. Calculate the voltage drop at 5 A and include that in your calculations. It's all Ohm's law: What is the absolute minimum output voltage of your power source? What is the absolute minimum...
  15. AnalogKid

    What happens if you connect 2 isolated power supplies backwards?

    It will damage stuff.
  16. AnalogKid

    Power supply ratings

    No. It provides a constant 24 V to the load. This is a constant voltage power supply. ak
  17. AnalogKid

    Power supply ratings

    As above and from the labels on the device, it has a fixed, constant 24 V output. You can draw constantly any amount of current up to a max of 5,0 A. Note - if this is a switching supply, it might have a minimum output current requirement. Check the datasheet or owner's manual. many...
  18. AnalogKid

    Can some please tell me which is consider to be pin1 here

    There is a notch across the body on one end. I would put a corresponding bar across the decal like a diode. That plus text to indicate that the notch goes over the bar. ak
  19. AnalogKid

    Help with timers

    I continue to be bad at noticing the OP date before responding. oops.
  20. AnalogKid

    Help with timers

    There are dozens of different low cost timer modules on ebay. What is an automatic dog wash? ak
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