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  1. Arouse1973

    Computer Software to Simulate Circuits?

    LT spice. Its free and very good. Adam
  2. Arouse1973

    Help needed for 12V lead-acid switched mode battery charger.

    Um I know you have spent a time doing this and it looks pretty good.But this is the why you have to draw the schematic right. Your dc link caps are too far from the mosfets to be honest. You have to make sure you have the correct clearance and creepage for mains. Send me the gerber to...
  3. Arouse1973

    How does diode dissipate energy?

    I know this might be a simple explanation and Ratch covered all of this, but what about this? When a charged particle as in this case an electron is accelerated in a conductor due to the application of an electric field it will collide with ions (atoms that have lost an electron) in the...
  4. Arouse1973

    Help needed for 12V lead-acid switched mode battery charger.

    No Probs
  5. Arouse1973

    Help needed for 12V lead-acid switched mode battery charger.

    Ok looks like it's good to go. Personally I would re-draw the switching part to look something like this. It's a bit easier to follow as is the conventional way to draw this. The turns ratio for the output is spot on only thing to make sure is you get the dot convention correct see drawing...
  6. Arouse1973

    buffer circuit before rlc

    Sorry if I seem a bit dumb I thought a battery does not not produce a voltage until it has a load. It has potential electrostatic energy otherwise. Which is only released when a load is connected. The electrostatic potential is derived from the voltage coeficients of the material used to make...
  7. Arouse1973

    buffer circuit before rlc

    I would. That's my opinion and I am intitled to it.
  8. Arouse1973

    Long duration timers - Notes for beginners

    Steve Audio up to 100KHz is that for bats? Adam
  9. Arouse1973

    Help needed for 12V lead-acid switched mode battery charger.

    Ohmy Ohmy sorry had to say it. What PWM are you running on. Thanks Adam
  10. Arouse1973

    buffer circuit before rlc

    I have always used constant current to determine the fact that the current is constant through a circuit and a source of current or current source as something different. A source of current is just that something that can supply current. A battery can supply a current to a resistor connected...
  11. Arouse1973

    Help needed for 12V lead-acid switched mode battery charger.

    Hi Kris I think its quite dangerous using transformers from something else as you know saturation current can be very dangerous at that high current. I would have gone for a poly phase converter. I'll have a look but I am a bit concerned about these salvaged transformers. Cheers Adam
  12. Arouse1973

    Help needed for 12V lead-acid switched mode battery charger.

    Ok give me sometime and I'll get back to you.
  13. Arouse1973

    Help needed for 12V lead-acid switched mode battery charger.

    Hi Kris can we just recap what the issues are here, there is a lot going on in this thread and I am struggling to pick through it. Adam
  14. Arouse1973

    buffer circuit before rlc

    I use constant current term for just that. Other than that I use just current source for somthing that can supply current that is not constant. That's just what I do. Adam Yes that is what I was trying to say. Thanks Adam
  15. Arouse1973

    Op Amp Stability

    That's interesting. I thought noise was any unwanted voltage at the input or output of a circuit. And this unwanted voltage that appears on the non inverting input get amplified by the gain +1. You don't mention the +1 in your formula. So everyone says noise gain is important for stability but...
  16. Arouse1973

    Op Amp Stability

    Oh yes I see where I went wrong. I was doing so many different simulations late at night, I must have imported the wrong graph. I will amend this as soon as possible. Adam
  17. Arouse1973

    Op Amp Stability

    Ok Yeah I just didn't want message tennis taking up all this space. I found an article on noise gain you might be interested in. http://electronicdesign.com/analog/whats-all-noise-gain-stuff-anyhow Adam
  18. Arouse1973

    Op Amp Stability

    I'll have a look Lvw. You can PM me if you want and we can discuss, when we come to a suitable compromise then l will add this to the thread, saves clogging up this thread with message tennis. Thanks Adam
  19. Arouse1973

    buffer circuit before rlc

    Just to clarify. I think Lvw means a constant voltage and constant current source. A battery is a voltage and a current source. Adam
  20. Arouse1973

    Op Amp Stability

    Hey Lvw I am planing on making an excel spread sheet so that peaple can input the op amp parameters and get a phase margin with and without load capacitance and then when they apply say a resistor in series or a cap from output to input how does it change the phase margin. Maybe this is somthing...
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