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  1. (*steve*)

    Testing Oddball MOSFETs

    Reading back, those sound like they're all 2SJ162's, P channel MOSFETs. 3V should be enough to turn on the MOSFET, so the tester should work. Also, they have protection for the gate so it should be relatively difficult to destroy. Have you tried the tester on some normal transistors just to...
  2. (*steve*)

    Testing Oddball MOSFETs

    It looks like the last 2 are thoroughly failed, effectively bring shorted out. The first one *might* be ok if it has a Vgs(th) higher than the tester can supply. What are the part numbers corresponding to images 1, 2, and 3? Have the parts been handled using anti static precautions? Have any...
  3. (*steve*)

    Function and their types

    Now you seen to have done it.
  4. (*steve*)

    Function and their types

    Please see post #2
  5. (*steve*)

    Volts per metre

    That was a bit of a joke. 1V/m is equal to xV/xm. If x is 1.5, you get 1.5V per 1.5 metres.
  6. (*steve*)

    Function and their types

    You didn't study it very well. Why are you expecting a return value from your function "delay"?
  7. (*steve*)

    Volts per metre

    It is equivalent to 1mV per mm, or 25.4 mV per inch. If you want it in more fundamental units, then 1V/m is 1 (kg.m)/(s3.A). I'm not sure that's what you want. It's the same electric field generated by a 1.5m long 1.5V battery.
  8. (*steve*)

    Function and their types

    Check the syntax of the for statement. Also, if you have a function that doesn't return a value, why are you trying to assign a variable the return from it? What do you expect it to do?
  9. (*steve*)

    Testing Oddball MOSFETs

    Show us a picture of what appears on the tester's screen.
  10. (*steve*)

    Old Style Op Amp

    Do you have any idea what you're talking about? Because we don't.
  11. (*steve*)

    Is it possible for a MOSFET to work intermittently?

    If the device has been in a high vibration environment (e.g. a car) then it is possible that a poor solder joint has fractured. This may produce an intermittent failure. The same thing could occur with bond wires inside a package, but this is much less likely. This is a direct answer to your...
  12. (*steve*)

    Ideas to start my project.

    Start by figuring out how you can tell if a bulb has burnt out.
  13. (*steve*)

    ETI Australia

    That might save me a few trips to the library.
  14. (*steve*)

    Ideas to start my project.

    Start by googling how these things are done.
  15. (*steve*)

    Digital piano won't power ON

    Get a new one and replace it. Be VERY sure to get the polarity correct. Also I tend to agree with Edd. I didn't spot that it was a linear power supply. There's a far smaller chance of those caps bring bad
  16. (*steve*)

    Pointer dereferencing

    Vead, as you're aware, a variable is a name given to a place to store a value. That name is only important to you. When the program is compiled, that name essentially disappears, and the program works with the storage location. There are multiple types of "locations", but let's keep it very...
  17. (*steve*)

    Digital piano won't power ON

    That may well be a multi layer board, and in any case one leg was connected to a fairly large ground plane. There's probably nothing special about the solder, the board was just sucking heat from your soldering iron.
  18. (*steve*)

    Hello can somebody teach me how to connect am to arduino

    You need sufficient varactors to provide the required capacitance, and provide a voltage swing sufficient to vary the capacitance through the required range. You have basic idea. Would you like us to build and test a prototype after we design it?
  19. (*steve*)

    For Sale: National B&W television Model No TR-5090A

    Couldn't be further away from my colleague :-) He says he'll find one a little closer. Sorry.
  20. (*steve*)

    For Sale: National B&W television Model No TR-5090A

    What state are you in. My colleague is interested!
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