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  1. (*steve*)

    How do you verify your ohmeter works?

    You might also want to read this. Sharp images are far more useful than fuzzy ones.
  2. (*steve*)

    LEDs powered from AAA battery

    You need a resistor (or multiple resistors, depending on how you wire the LEDs) to limit the current through them. LEDs are not like light bulbs. In our resources section we have a resource about LEDs. Sections 1 and 2 would be the most relevant to what you're doing I think.
  3. (*steve*)

    How do you verify your ohmeter works?

    It depends on the meter. If it's digital, it should real something like OL when the leads are not connected together. When shorted, you should get a very low number, say 0.5Ω or less. Connecting a known resistor should give you a reading near that value. If there resistors are of a high...
  4. (*steve*)

    Woo-Woo Powerful changing magnetic field generator. Can influence human cells activity ?

    Do you have anything more than "it feels good therefore it must be true"?
  5. (*steve*)

    Woo-Woo Powerful changing magnetic field generator. Can influence human cells activity ?

    If you ask me, it's rotating a static magnetic field. It also appears to me that you have a magnet attached to a motor. You then go in search of what it can do, making what appear to be unsupported assertions about what it's "like". It reminds be of another thread of yours we moved to the woo...
  6. (*steve*)

    Woo-Woo Powerful changing magnetic field generator. Can influence human cells activity ?

    Possibly destined for moderator action...
  7. (*steve*)

    Capacitor terminals

    It's the one with the capacitor symbol. It's between Ω and Hz. Well... The capacitance range may tell you the capacitance (as long as your meter can read up to the capacitance of this capacitor). It won't tell you if it has high leakage or high ESR. Do you have any reason to think it's faulty?
  8. (*steve*)

    Capacitor terminals

    Well, you could try the capacitance range, but there are many other parameters that your multimeter can't test. Is there a reason you want to test it? Depending on that reason, your multimeter may only give inconclusive results.
  9. (*steve*)

    Digital piano won't power ON

    The lack of that component (and the associated lack of components near it) suggests that for your model of the digital piano, a part of the power supply is not required (perhaps it supplies a voltage rail that is unused?).
  10. (*steve*)

    PCB Edge Connector

    I looked up "card edge connector" on mouser and they have lots (although none that match your exact requirements). Here is a datasheet which may help you determine the parameters you need to search for.
  11. (*steve*)

    Electret Microphone Help

    What is an "Arduino transmitter and receiver"
  12. (*steve*)

    Diode

    That doesn't read like a normal part number. A photo might help, but there are many types of diodes, and it may not be possible to do more than guess. If it's possible to trace some of the circuit it may be possible to make a better guess.
  13. (*steve*)

    PCB Edge Connector

    Aaah, now I see. Look for "card edge connectors"
  14. (*steve*)

    PCB Edge Connector

    I think you'll find it's 5.08mm between connectors, and the board is probably 1.6mm thick :-) That spacing is very common among larger or higher voltage connectors. It is 1/5 of an inch spacing, or double the 1/10 inch (2.54mm) spacing that is common in electronics. I can't see enough detail...
  15. (*steve*)

    What is up with this?

    Yeah, but consider that they are suggesting a major difference between 20mΩ and 100mΩ. For a 10A current, you're looking at 200mV vs 1V. Reducing the voltage overhead will have a far greater effect on dissipation, and by the time you need to consider the Rds(on), the regulator (whatever it is)...
  16. (*steve*)

    What is up with this?

    I have the feeling the answer is here and here. But my google-fu is not good enough to find anything which explains it in more detail.
  17. (*steve*)

    What is up with this?

    Which is why I moved this discussion. :-) I expect someone like @AnalogKid or maybe @Ratch will chime in with a more authoritative answer, but my understanding is as follows: The "output" is essentially the top of the current sense resistor, and the negative feedback limits the gain of the...
  18. (*steve*)

    Hi all

    Hi Kevin, Don't worry, you'll fit right in here :-D
  19. (*steve*)

    How to fix uncontrollable volume of a portable AM/FM/SW radio?

    Check all the connections to the volume control and where they go to. If the ground wire is broken you could see this issue. This assumes the volume control is a normal potentiometer and not some digitally controlled device.
  20. (*steve*)

    IC's temperature ratings

    There may be some mundane reasons why milspec ics, with their large operating temperature ranges, are more expensive. Often (at least in the past) you would find them in much more expensive ceramic packages. Added to that, the quantity of manufacture would be much lower. And testing may need...
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