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  1. Arouse1973

    Thevenins and nortons circuit help

    If I redraw it for you can you now see which ones are in series and parallel? And what do you do to the voltage source? Adam
  2. Arouse1973

    Thevenins and nortons circuit help

    Ah this is where it can get tricky. Have you covered parallel resistors yet. I would have thought you had by the time you got to this sort of question because you are going to need it. Adam
  3. Arouse1973

    Help with LED strobe

    And you mate. Good luck Adam
  4. Arouse1973

    Thevenins and nortons circuit help

    So for Norton's what do you have to replace R4 with? Clue it's not an open circuit. For Thevenins what do you think you have to do with R4 replace it with?. Clue it's not short circuit. And what voltage do you think you need to replace the 12 Volt with to work out the resistances? So your...
  5. Arouse1973

    Help with LED strobe

    Yep that's what the diagram shows. Oh and don't forget 1-3 6-4 11-5 and 6 to R6 :) Adam
  6. Arouse1973

    Flouresent problems

    Do they just stop or flicker and then go out? Specs of the tubes please and how you have them connected. A little drawing would also be good if you can. Thanks Adam
  7. Arouse1973

    230v relay switching problem with rf

    Please answer @KrisBlueNZ questions. Why are you using RF and what is the RF signal. What frequency and amplitude. Adam
  8. Arouse1973

    Help with LED strobe

    Hello It's not 00 it should be Q0 and Q1 etc. It is just the outputs in the order they switch. Why Q you ask, it's tradition that stems back many years and although there are many speculations like it was the shape of the transistor or in case the person typing the data sheet got O mixed up with...
  9. Arouse1973

    Ground loop of Agilent 33250A

    I have done some examples for you now I have time. The first one shows the current of a standard setup. None of the values have been calculated but best guess was used just to show you the principle. The second one is with the Agilent set up and your output screen and load connected to ground...
  10. Arouse1973

    Help With Lock Circuit - Transistors

    Ok post the relay circuit tomorrow and I'll have a look. Adam
  11. Arouse1973

    Help With Lock Circuit - Transistors

    Try a pull down on the gate of the Thyristor see if that helps. Edit: You may need a series current limiting resistor also for the gate, depends how good the simulation is.
  12. Arouse1973

    Help With Lock Circuit - Transistors

    Your LED at the bottom of the Thyristor needs a current limiting resistor and you could benefit from a pull down resistor on the gate connected to the Thyristor to common 0Volts, this should ensure it turns off when you remove power.
  13. Arouse1973

    Help With Lock Circuit - Transistors

    Which is Q4? It's an emitter follower so it does not amplify voltage only base current. So what voltage you put in will appear on the emitter minus the voltage drop of the base emitter diode. Adam
  14. Arouse1973

    Help With Lock Circuit - Transistors

    Which transistor, you have to tell us the circuit reference.
  15. Arouse1973

    Timer to trigger another timed pulse

    Ok I thought by looking at the module is that the first push button sets the delay before on and the second the delay of on? For the phone button contact no power is needed you are just using the relay as a switch. Adam
  16. Arouse1973

    Help With Lock Circuit - Transistors

    Which transistor Q7? Your better off showing us the circuit that didn't work. Adam
  17. Arouse1973

    SMD Capacitor identification

    PSML Kris, you crack me up.
  18. Arouse1973

    SMD Capacitor identification

    Care to add any more to that Colin? Adam
  19. Arouse1973

    Greetings

    Hello FoxKoun, welcome. Adam
  20. Arouse1973

    LED light bar help

    What about driving them from an emitter follower with an RC network on the base to fade them in. This might work. Adam
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