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  1. Arouse1973

    PCB Software

    Its called pads pcb.
  2. Arouse1973

    Transistors

    Anyway I get the message. So thanks for the help.
  3. Arouse1973

    Transistors

    Yes Ratch. It is very good I came across a pdf a few years ago Didn't realise where it came from at first. I have also contacted Ian Sefton a few times he is well cool. Adam
  4. Arouse1973

    PCB Software

    I use mentor graphics. The demo version allows you to do small PCBs. Adam
  5. Arouse1973

    Transistors

    I agree it's some what misleading. Their are loads of mistakes and misunderstandings in engineering here are a few I have found. What's also confusing is the picture of an NPN transistor shows the correct flow of linking current from the emitter to the collector. But we all use conventional...
  6. Arouse1973

    Transistors

    I think I get it now Ratch. It's Poisson’s Equation isn't it. That's what the quasi neutral regions are for and the total charge is zero which is why there is no electric field. Electric field only exists in the junction region because there are no free carriers in the neutral regions. Thanks...
  7. Arouse1973

    sniffing with a sniffer

    I wouldn't worry too much about that the only problem you will have is the smell of burning plastic in the office. I often insist on at least 10 seconds just to piss everyone off. Solder it quickly and you will be fine.
  8. Arouse1973

    Transistors

    Hi Ratch I must say what a very good explanation of how a BJT works . I am a bit confused well it don't take much. I was once told in a post that if I wanted to be pendantic then a BJT was in fact a field effect device. I was not sure but ended up using this in a presentation amongst other...
  9. Arouse1973

    sniffing with a sniffer

    You didn't say your product was failing. You gave the impression you were doing precompliance testing. Hence my reply.
  10. Arouse1973

    sniffing with a sniffer

    Oh this sounds interesting. The last picture you show is from the great Keith Armstrong. I have had the great pleasure to have been taught by him one of the most respected consultants in EMC. One thing I will say about near field probes is that they certainly have their place in EMC but...
  11. Arouse1973

    Transistors

    I always use this for my design process. I thought everybody did?. Everyone knows 0.7V with and idility value of 1 = 2000Amps with no base resistor don't they.;)
  12. Arouse1973

    why we need Load resistor?

    That's the one Bob. I remember you answering it.
  13. Arouse1973

    Transistors

    Cool Video. Thanks
  14. Arouse1973

    why we need Load resistor?

    I remember some guy who wanted to build an amplifier and not buy one. He thought because he had a 8Ohm speaker he needed an output of 8Ohms for maximum power. :) Adam
  15. Arouse1973

    Parallel LRC circuit analysis help

    Look very good. Only thing I can see that might be wrong is you state R as being j10 as being an imaginary number. Shouldn't it be just 1/10. The average power in the coil and capacitor if ideal components will be zero. The phase angles are +90 and -90 for ideal inductor and capacitor that...
  16. Arouse1973

    circuit components

    Look at the numbers on the devices. Put that into Google and you should find the information. Like CD4017 I just did and found this data sheet. http://www.ti.com/lit/ds/symlink/cd4017b.pdf
  17. Arouse1973

    Transistors

    Oh ok thanks So what is the correct term for voltage. God I thought I was reasonably competent at this, you take it to the next level. I see I have a lot more work to do on this. You see this is my hobby and also my job for the last twenty years but you just don't use this sort of thing every...
  18. Arouse1973

    Op-Amp input signal question? idk

    It would be better if they said the maximum voltage swing was +12V supply and not use the word ideal. Because an ideal opamp does not exist. To the extent that if one did exist it wouldn't be very long before it destroyed the planet and possibly the universe. And I am not joking. To answer...
  19. Arouse1973

    Transistors

    Hi Ratch I thought unit charge was the coulomb. And so a joule per unit charge (Coulomb) is 1 joules for every coulomb. Is that not the same. Thanks Adam
  20. Arouse1973

    circuit components

    The data sheet will tell you what the things are. Assuming the things are the components. What do you want us to do, identify each component for you.
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