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  1. Arouse1973

    picoPSU 120 switch on 12V rail

    I know that but you have to plug in power to it don't you?
  2. Arouse1973

    picoPSU 120 switch on 12V rail

    What power supply are you using? Adam
  3. Arouse1973

    Slight Instability at start on active phase shift circuit

    So for your input of 2 V you will need an opamp with a slew rate of 2 * PI * F * V = 2 * 3.1416 * 100*10^6 * 2 = 1256637061 V/s or 1256 V/us. Yours is 700 V/us typical. So the max input you will be allowed is V=SR(Slew Rate) / 2 * P I* F = 700*10^6 / 2 * 3.1416 * 100*10^6 = 1.114 V Thanks Adam
  4. Arouse1973

    Help please with transistors

    Surface mount, are you sure? Adam
  5. Arouse1973

    Slight Instability at start on active phase shift circuit

    Ok I know what it is, as LVW said it is slew rate limiting. Drop your input voltage to 0.5 V. Thanks Adam
  6. Arouse1973

    Slight Instability at start on active phase shift circuit

    Settling time I think you'll find, not instability. Adam
  7. Arouse1973

    What's a good voltage tolerance for a small power supply?

    LOL. Sorry that's a new one on me sheeps bladders. But I suppose stretching them over the tectonic plates would have an effect of some kind. :)
  8. Arouse1973

    Slight Instability at start on active phase shift circuit

    Can you explain the voltages you show on the photo. Which one is unstable? I can't see signs of instability but then you have chopped of the sides of the photo, we can't see the scales. Can you explain what this circuit is suppose to do? What is it being used for? Thanks Adam
  9. Arouse1973

    Slight Instability at start on active phase shift circuit

    So your circuit is completely different to what you original mentioned.
  10. Arouse1973

    What's a good voltage tolerance for a small power supply?

    A charged car battery, current meter,thermometer, 12V heating element and a bucket of water is all you need to calibrate a multi meter. :) Adam
  11. Arouse1973

    Slight Instability at start on active phase shift circuit

    What input signal are you using? Adam
  12. Arouse1973

    Terminal voltage sensing

    Only a constant voltage equivalent to the terminal voltage of a fully charged cell or battery pack, not just any old fixed voltage. Do you think we need to be a bit clearer about this? Otherwise people might think they can connect a battery straight across a power supply that might be set a lot...
  13. Arouse1973

    time delay

    What sensor are you using? Thanks Adam
  14. Arouse1973

    Terminal voltage sensing

    Fast type battery chargers that are used for power tools as an example generally have two types of sensing. The first is negative delta voltage detection, when the battery is near fully charged the battery voltage drops slightly and this is what is sensed initially. It can be a bit unreliable at...
  15. Arouse1973

    Help with Burned out 3000 watt inverter

    No probs, hope it all works out.
  16. Arouse1973

    Electronic power and resistance rules

    Yes I second that Kris.
  17. Arouse1973

    PCB Layout Help

    Good Luck.
  18. Arouse1973

    Help please with transistors

    I knew you'd have a go Kris, well spotted. Just wish that I had time last weekend to have a go Adam
  19. Arouse1973

    PCB Layout Help

    Good advice Kris. Adam
  20. Arouse1973

    PCB Layout Help

    I can't see your guard ring connected to anything? Is this right? Adam
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