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  1. Arouse1973

    Microcontroller controlled by pushbutton for LED flashlight

    Hi Jeff Ok thanks Jeff, I have ordered a couple of PICs so I can get a demo working my end. Adam
  2. Arouse1973

    Leading and Lagging AC Power

    Thanks John Adam
  3. Arouse1973

    Microcontroller controlled by pushbutton for LED flashlight

    Ah ok so if someone flips the mechanical slider switch quickly back and forth you want the output to flick on and off also. Adam
  4. Arouse1973

    Leading and Lagging AC Power

    Hi John What I am trying to explain, which might be wrong, lol, is with the ideal inductor and core it has such a large permeability that it requires virtually no current to establish the magnetic field. This has a much lower amount of wasted energy that it would almost be of no gain to use PFC...
  5. Arouse1973

    Will my circuit work? (trying to make a who pressed first quiz buzzer)

    Well done Robert, nice one. Feels good doesn't it. Now you can think about refining it if your interested. Adam
  6. Arouse1973

    Microcontroller controlled by pushbutton for LED flashlight

    Hi Jeff Can I just confirm that the last circuit Kris drew is the one your going with? Also what do you actually want the output to do when the button is pressed for less than 500 ms. You say momentary operation, can you clarify. Thanks Adam
  7. Arouse1973

    Relay driver

    Sorry I haven't got a clue what your talking about. How can we go from designing a timed relay circuit to now a differentiator? You need to draw your circuit and tell me what your doing. Thanks Adam
  8. Arouse1973

    Will my circuit work? (trying to make a who pressed first quiz buzzer)

    Hey Robert. Thats a good idea, ground the reset pin. I was thinking of stopping the activation of the trigger transistor like in your origional idea. C1 is the debounce cap it stores a bit of energy so the base of the transistor doesn't wiggle up and down when the switch bounces. Debounce is...
  9. Arouse1973

    Will my circuit work? (trying to make a who pressed first quiz buzzer)

    Hey colin that looks good. But it would be good if we could get his current design working. Once we have done that then yeah we could introduce some different design ideas. Adam
  10. Arouse1973

    Microcontroller controlled by pushbutton for LED flashlight

    Great thanks I'll have a look. Cheers Adam
  11. Arouse1973

    Leading and Lagging AC Power

    Hi Ratch. Ho is the operating peak magnetizing force. Thanks Adam
  12. Arouse1973

    Microcontroller controlled by pushbutton for LED flashlight

    Ok I understand that now thanks, why does it have to be that way out of interest. Why can't you power the PIC all the time. Sorry for the dumb questions. Adam
  13. Arouse1973

    Leading and Lagging AC Power

    Thanks Ratch I will look at this in detail later. Oh my last reply should have been to @Tha fios agaibh sorry I didn't reply directly. Cheers Adam
  14. Arouse1973

    Leading and Lagging AC Power

    Magnetising current is the current needed to ensure the core produces the desired magnetic field by aligning the magnetic domains. It's the setup current for the magnetic field. It is defined as Ho / 0.4*pi*N for a wound core. If not used this is wasted current because it has to be given again...
  15. Arouse1973

    Microcontroller controlled by pushbutton for LED flashlight

    Hi Jeff Don't quite understand why all power is lost when the MOSFET is on. Can you explain this in detail? Thanks Adam
  16. Arouse1973

    Microcontroller controlled by pushbutton for LED flashlight

    Hi Jeff my programming skills are no where near what Kris was able to do. I can only programme in assembler but for this simple programme I would have thought it will be fine. However I do have a group of guys I work with who could knock this up in C if you needed to. I need to just get my head...
  17. Arouse1973

    Relay driver

    Why do you want to do that?
  18. Arouse1973

    Relay driver

    To give a fast trigger output to the relay transistor. Adam
  19. Arouse1973

    Relay driver

    There are 6 gates in one IC you only need 2 of them, but you could use the others for something else on the circuit if you want to. It's just a simple time delay circuit. When power is switched on for the first time C1 produces a positive going voltage which triggers the first invertor gate...
  20. Arouse1973

    Resistance of double sided adhesive conductive carbon tape

    Yeah Trevor's right. Also it's not very accurate measuring with two probes. I have always seen it done with 4 probes. Adam Here you go :)
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