Search results

Search Forums New Posts
  1. Arouse1973

    Transformer help

    Just make sure you heat sink the devices if needed. At 1 Amp the device will be dissipating 5 Watt of power. Adam
  2. Arouse1973

    Hi all!

    Hello Jeremiah, welcome :) Adam
  3. Arouse1973

    Aux car light switch setup?

    Hello Can't see anything major just a few points. You need to indicate the 0V battery connection is connected to something. Question: Why 30A fuse, seems quite high also can't you just use the switch without a relay the reason I say this is otherwise you will need some flyback voltage...
  4. Arouse1973

    How a BJT Transistor works (base current version)

    Some good points there Ratch. I don't quite understand why people keep going on about this chicken and egg thingy. I think there is always a sequence of events, I am pretty sure the laws of physics can tell us this. We just need to ask the correct question with the correct terminology to get the...
  5. Arouse1973

    How priorities change

    As long as the equipment you are running can cope with the voltage the charger puts out yeah I guess this would work. You have to keep an eye on it and take it off charge when ready. Cheers Adam
  6. Arouse1973

    boost converter

    You could look at a buck boost regulator. I think you will have trouble going down to 0V, 0.8V is more realistic. I suppose you could put a couple of diodes in series to drop to virtually 0V. But this wastes energy. Adam
  7. Arouse1973

    Help identifying this component (capacitor)?

    Looks like a 100uF 10 Volt Tantalum capacitor. They come in different case sizes so measure it to get the right one. Difficult to tell but looks like a case B or C. Case C (6032) 6mm x 3.2mm Case B (3528) 3.5mm x 2.8mm Thanks Adam
  8. Arouse1973

    How a BJT Transistor works (base current version)

    The reason a rising voltage is seen to be causing a reduction in current is because the diodes diffusion current is small compared to the capacitor transient current because the input voltage has not caused the diode to conduct significant current at that point. Adam
  9. Arouse1973

    How a BJT Transistor works (base current version)

    And if I Zoom in. It shows the emitter current decreasing at the voltage rises. Then they both settle down to be constant. All this tells me is the capacitor is charging. They both have a similar curve. Thanks Adam Edit: Should be charging.
  10. Arouse1973

    Hi Guys

    What interesting things :) Adam
  11. Arouse1973

    Hi Guys

    Yeah welcome also. Adam
  12. Arouse1973

    Need Help_New to Electronics

    How do you know you can get internet if you don't have a battery backup router? Adam
  13. Arouse1973

    How a BJT Transistor works (base current version)

    No that's fine Claude I also have an understanding of transmission line theory it would be great to have a discussion at some point, but not here. But please answer my last post, I would like to get to the bottom of this. Adam
  14. Arouse1973

    Should wire be Twisted before Crimping?

    My company has thousands of looms manufactured each year and we do not specify to twist the wires. For the reasons already pointed out, we were told the machine crimps to a certain depth and twisting could loosen the wire overtime. Thanks Adam
  15. Arouse1973

    How a BJT Transistor works (base current version)

    Is this similar to what you are seeing? Adam
  16. Arouse1973

    How a BJT Transistor works (base current version)

    Did I say V before I? Sorry if I gave that impression. The voltage drop across a component is Joules per Coulomb which means there must be a current this is measured in volts. Can we look at a simple diode simulation then. Shall I do it? Adam
  17. Arouse1973

    How priorities change

    Hello and welcome back :) Larger battery should be fine. I would also have a separate fuse for each unit, the car battery has a lot more available current behind it if a fault was to occur. The only issue I have had with using a battery conditioner is that it's doesn't always come out of...
  18. Arouse1973

    How a BJT Transistor works (base current version)

    I thought the V in the equation was the voltage across the p-n junction? Thanks Adam
  19. Arouse1973

    How a BJT Transistor works (base current version)

    Claude You did show your findings with two diodes in your last example. So just to clarify are you also saying that the voltage across the p-n junction is also not indicative of the current through it? If so, if we simulate just a bog standard diode with a fast rising edge and say a 150R...
  20. Arouse1973

    How a BJT Transistor works (base current version)

    Hi LvW No I don't think it is frequency dependant only the fact that NPN and PNP are different even with the same parasitic components but that's not what I am talking about. What I am trying to do is tease out the anomaly that Claude is talking about and explain it. And this is the initial...
Top