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  1. Arouse1973

    JFET Depletion Regions

    If we take a N channel JFET for example. When you connect a voltage source across the drain and source you will get a current through the device. As the voltage across the drain and source increases the depletion region nearest the drain elongates its self up towards the drain. Sort of making a...
  2. Arouse1973

    How a BJT Transistor works (base current version)

    I did see that this morning. Let me read it again.
  3. Arouse1973

    How a BJT Transistor works (base current version)

    Pointing iN Darling! :)
  4. Arouse1973

    Some way to disable auto-standby on TV soundbar

    Come on Martin, the other button would get covered in chocolate, because the other finger is used to break the cunks off a big bar while watching TV, stupid :)
  5. Arouse1973

    LED circuit help

    Good idea Mr M.
  6. Arouse1973

    LED circuit help

    As long as you have enough voltage headroom and the current is within spec you should be fine, if the LEDs are from different batches you can sometimes get a difference in brightness. The best way to drive LEDs in series is with a current source. Then you don't have to worry at all about the...
  7. Arouse1973

    LED circuit help

    Hello You are correct in your assumption. You will need at least 15 Volts. However it's not quite as straight cut as that. The LEDs voltage drop is prodominatly dependant on current. So the LED will drop 3 Volts at a specific current only. If you look in the data sheet it will show you this...
  8. Arouse1973

    A few questions about coils from someone with no knowledge

    LOL, they might be using a wormhole or negative matter to allow signals to travel faster than the speed of light. Adam
  9. Arouse1973

    Led's to be programmed for Swiss locos

    Hello. Sorry I don't understand what you want to do. What does this mean? "I have model HO trains and copy would like to install the Swiss light change from 3 white in the front to 1 white in the back." Thanks Adam
  10. Arouse1973

    Serial Port Monitor (Data Logger)

    Nice Chris, thank-you Adam
  11. Arouse1973

    Drill bits for homemade PCBs?

    Sorry Chris I thought it was a picture of you :)
  12. Arouse1973

    Drill bits for homemade PCBs?

    I must admit this Forum is the best. I have been on many and the banter on this site is top notch. But when we mean it we get right to it. I do miss the bushy beard Chris of your old Avatar. Adam
  13. Arouse1973

    A few questions about coils from someone with no knowledge

    When you add a core to a coil of wire and you supply a current which create a magnetic flux in the core. Tiny magnets called domains line up and produce a magnet themselves, adding to the original magnetic flux. Magnetic fields extend out to the far reaches of the universe, the reason why they...
  14. Arouse1973

    Hi from Martin

    Hi Martin! Adam
  15. Arouse1973

    Need professionally made circuits to control heaters using PWM and MOSFET

    A data sheet of the heaters would also be good. Adam
  16. Arouse1973

    Interfacing with a PIC Microcontroller

    No probs!
  17. Arouse1973

    Interfacing with a PIC Microcontroller

    The pic I posted was for you to look at the pic micro in the centre of the PCB. I didn't mean to use the dev board :) Adam
  18. Arouse1973

    LED FLASH/ON

    The 555 timers reset pin is not recommended to be used as an input pin. This is because of the very low and variable threshold. Another quirk of the 555 timer that has caught people out before. But that's only my opinion. Adam
  19. Arouse1973

    Interfacing with a PIC Microcontroller

    I am using one of these at the moment, haven't had any issues with the PIC. Not sure if it has enough pins for you. http://dangerousprototypes.com/wp-content/media/2012/06/Circuit1.png Adam
  20. Arouse1973

    Low voltage disconect circuit

    Drop the Arouse it's too formal, Adam is fine :)
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