Search results

Search Forums New Posts
  1. (*steve*)

    Transistor pair to switch between Voltages

    Looks fine. Note that they are P Channel MOSFETs, not PNP MOSFETs. We've also spoken about the resistors for the LEDs. Neither of the issues will stop it working :-)
  2. (*steve*)

    Home automation and question about Neutral generation

    And your earth leakage breaker to trip.
  3. (*steve*)

    41 volts in my DVD's AV output jack ground.

    The correct way to test a fuse is using the ohms range on your multimeter, with the power to the appliance off (and with it unplugged) and without any resistor. Remember what I asked you to do ages ago?
  4. (*steve*)

    41 volts in my DVD's AV output jack ground.

    That's probably your problem. However we don't know if it was the original problem or not. In any case, to effect a repair, your have to determine what this IC is and replace it. I can't see any margins on the chip other than the index mark which indicates pin 1. Even if you do manage to...
  5. (*steve*)

    41 volts in my DVD's AV output jack ground.

    No that's just flux residue left from the manufacturing process.
  6. (*steve*)

    Help me calculate output impedance

    http://fourier.eng.hmc.edu/e84/lectures/ch4/node9.html
  7. (*steve*)

    Help me calculate output impedance

    I scrolled through the first one I saw and got the answer.
  8. (*steve*)

    Help me calculate output impedance

    http://bfy.tw/9PDI
  9. (*steve*)

    translating schematic for device variant

    No, it doesn't
  10. (*steve*)

    Help me build a spaceship

    I have some connectors labeled as being parts for the space station :-)
  11. (*steve*)

    41 volts in my DVD's AV output jack ground.

    I don't know (there are several possibilities), but the test I've asked you to do will help us establish a few facts which might help narrow down the cause and possibly the problem.
  12. (*steve*)

    Where to count legs from for TO-94?

    You number the legs based on the shape of the package, not where the label is placed (the are unlabeled devices). The best thing to do is to look in the product's datasheet which will typically show all the packages and label or otherwise describe the numbering.
  13. (*steve*)

    41 volts in my DVD's AV output jack ground.

    Was that in reply to me? Nothing is going to get "busted" with the power disconnected.
  14. (*steve*)

    41 volts in my DVD's AV output jack ground.

    Let's start with the basics. And with the power OFF. A general photo of the outside of the unit will help us point you at stuff to look at. Check out the power switch. Does it physically switch the mains (does the mains wiring run up to the switch)? Measure the continuity of the wiring...
  15. (*steve*)

    Best way to detect what power source is connected?

    You've fine to the effort of having "perfect diodes", adding the fuses will put back some of that voltage drop. This is even worse if you're considering polyfuses.
  16. (*steve*)

    41 volts in my DVD's AV output jack ground.

    Where exactly do you see 41V?
  17. (*steve*)

    Stage Line 500W amp repair project

    Don't cry. The amplifier is going to someone who will try to fix it.
  18. (*steve*)

    UV LED PCB Lithography Exposure Unit

    Have you checked the spectral sensitivity of your material?
  19. (*steve*)

    Switch help for my 737 simulator

    You might try looking for a 4 position rotary switch with one position momentary. Whether or not you can get one off the shelf is another thing.
  20. (*steve*)

    Hacking Nodal and Loop Analysis

    It may sound flippant, but choose whichever one seems easier.
View older results
Top