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  1. AnalogKid

    How to calculate resolution of ADC

    https://en.wikipedia.org/wiki/Analog-to-digital_converter
  2. AnalogKid

    Circuit that sends 1 pulse when input goes high, 2 pulses when input goes low

    start: like goto start ak
  3. AnalogKid

    Circuit that sends 1 pulse when input goes high, 2 pulses when input goes low

    Something like this. 1. This circuit powers up running a full cycle, 1 or 2 pulses depending on the input state. 2. The output is delayed by one pulse time (~493 ms) after an input state change. ak
  4. AnalogKid

    Circuit that sends 1 pulse when input goes high, 2 pulses when input goes low

    I think that is correct. A 555 and either a 4017 or a 4-bit binary counter can do this, with only a small buttload of external gating, assuming that the circuit always starts in one condition. There has to be feedback, but I'm trying to do it without flipflops. OP: Does the input stay in one...
  5. AnalogKid

    window comparator help

    What is the power source for the game? How many of the wires can be installed at the same time, correctly or incorrectly? You are correct, a group of window comparators might be a solution, but there is no way to know without more information. For example, if A, C, E, G, I, and K are set to...
  6. AnalogKid

    Help on design

    What idea? What is it you are trying to do? What are the 24 Vac inputs coming from, and what do the 24 Vac output go to? AND, again, are you trying to do wireless broadcast power, or are you sending and receiving control signals? ak
  7. AnalogKid

    The collapse of a magnetic field

    I have versions of that chart dating back to the 80s. I think the first was from Harris. Thanks for a PDF version. ak
  8. AnalogKid

    Powering my IC

    If your only power source is the 9 V supply, then a resistor and 4.7 V or 5.1 V zener diode with work fine. Be sure to place a decoupling capacitor across the IC power and GND pins. The IC current draw might be much greater than 1 uA, depending on what you are doing with it. ak
  9. AnalogKid

    Power supply can't get zero volts

    Here is what I think you are talking about:: http://www.discovercircuits.com/DJ-Circuits/dcindicator6.htm ak
  10. AnalogKid

    Power supply can't get zero volts

    Could you sketch that? ak
  11. AnalogKid

    cctv re-wiring

    "neutral"? Are we talking AC mains here, or low voltage DC? Where are you located? ak
  12. AnalogKid

    Constant voltage load

    As the source voltage increases, the effective circuit resistance decreases, making this a negative resistance device. Some power supplies really don't like driving these. ak
  13. AnalogKid

    On off switch using mosfet?

    Yes. Way overkill, but if that's what you have, no problem. ak
  14. AnalogKid

    On off switch using mosfet?

    The jack as described in your schematic is so common it is hard to find one *without* the disconnect switch. If you search for DC power jacks on distributor websites, you will find some with other switch arrangements, including fully isolated switch sections for other uses. ak
  15. AnalogKid

    Capacitor Protection Boards- How do they work?

    Steve - 4 likes. ak
  16. AnalogKid

    A zener diode question

    Since this is a homework problem, first you show us your work. Then we advise. ak
  17. AnalogKid

    A zener diode question

    I can.
  18. AnalogKid

    Power supply can't get zero volts

    On the 741 data sheet it states in tables and graphs that the output cannot swing to within about 1.5 V or 2 V of the rails and the input doesn't function when outside of the same range (working from memory). This is a common issue with general purpose opamps. The LM358 was one of the first...
  19. AnalogKid

    Headset

    https://en-us.sennheiser.com/headphone-call-center-headset-office-cc-540 Under Technical Data hit the Show More tab. Both the mic and earphone frequency response are tailored for voice-only applications. Music will sound terrible and your recorded voice will sound like you are coming through...
  20. AnalogKid

    LED Sequensing or chasing

    Impossible to say without a link to the kit... There are several ways to go. If the operating voltage of the kit is 9 V or 12 V, then you can put multiple LEDs in series on each output and adjust the current limiting resistor. If the goal is to have one chaser circuit driving several lines...
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