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  1. Arouse1973

    Chokes

    Hello Jules They are both inductors it's the application that sets them apart. Common mode chokes are used to primarily to reduce the common mode noise that appears on the power line. This comes from the equipment that might be using some kind of switching circuitry. Common mode noise...
  2. Arouse1973

    Need help with switch...110v and 12v.

    Like this http://www.meteorelectrical.com/110v-ac-8-pin-relay-trp6825.html?tax_val=1&currency=GBP&country_id=222&gclid=CP7EgOnlzcMCFSbkwgodv54AdQ#
  3. Arouse1973

    Need help with switch...110v and 12v.

    110 V relay. Then look for one that the contacts are rated for a current of 5 Amps. Adam
  4. Arouse1973

    Capacitors instead of batteries.

    Just one other thing. Super capacitors are not all the same. A lot of the smaller values are for low drain applications and will have too high a resistance for 400 mA. You may be thinking of adding smaller capacitors in parallel to make a bigger if you do then just check the data sheet first...
  5. Arouse1973

    Need help with switch...110v and 12v.

    Hello What about a relay? Thanks Adam
  6. Arouse1973

    Induction cooker pans?

    I think the reason for this anomaly is the thermal conductivity of the two metals. Wattage is irrelevant unless you know how hot the material is going to get with a certain amount of wattage. Materials in general that are not good conductors of current, won't conduct heat away very well either...
  7. Arouse1973

    Need help with calculations for a ribbon speaker cable!

    You don't need TL techniques at these frequencies even with a very broadband amplifier. Adam
  8. Arouse1973

    Need help with calculations for a ribbon speaker cable!

    Ur of copper is 1 it can't be 0.55. How are you calculating this? How are you measuring the inductance, tell me how you have things connected. Your picture is not clear at all. Take a closer picture so we can see how it's put together. Adam
  9. Arouse1973

    Random LED Colour Changer

    Ok Here's mine. With the ability to change the odds quite easily. Cheers Adam Edit: +2 caps for decoupling.
  10. Arouse1973

    Need help with calculations for a ribbon speaker cable!

    Hi Peter Ok you lost me a bit, what are you trying to do measure or calculate? What can't you get to tie up in your calculations. Are you trying to find another diamagnetic material with a lower relative permeability than copper? Can you draw out your cable with dimensions added so we can see...
  11. Arouse1973

    Need help with calculations for a ribbon speaker cable!

    I will spare you all the swear words that I could use for audiophiles that claim all these things that make a difference to the sound quality, most of which is bollocks :) Adam
  12. Arouse1973

    Random LED Colour Changer

    Yes hence my original suggestion of the CD4017. Kris's circuit is one way to do it, my version would possibly use less components. But hey there is more than one way to skin a banana. I won't say cat as I have two of my own :) Adam
  13. Arouse1973

    Voltage Divider +12V, -12V, Ground.

    Here is my solution to this is anyone is interested. Thanks Adam
  14. Arouse1973

    buzzer amplify

    That's because the piezo disc needs a higher voltage. This is what the transformer is doing. The other factor which allows overdrive and greatly increases the output is the resonant cavity. Two things running them in open air with a transformer is you risk over driving the piezo and much reduced...
  15. Arouse1973

    Random LED Colour Changer

    So I am thinking CD4017 and using the clock inhibit to freeze the count. Lets see what Kris comes up with. Adam
  16. Arouse1973

    Random LED Colour Changer

    Have you thought also about a group of people leaving at once. You would probably need quite a short period. Adam
  17. Arouse1973

    Random LED Colour Changer

    Could we be long lost twins :) I doubt it, your better looking than me LOL
  18. Arouse1973

    Random LED Colour Changer

    A simple solution but not really random one would be to have a counter running with alternate pins connected to the LEDs and when the user presses the switch only one pin would be able to drive the LEDs at any one time so it's pot luck. You could trigger a timed latch which made it easier to...
  19. Arouse1973

    Induction cooker pans?

    The thickness that copper would need to be to produce the same heat as steel would make the pan impracticable for cooking. The trouble with a lot of the articles on the web about eddy currents is it's all about reducing them. This is because we often want to stop them causing heating issues...
  20. Arouse1973

    Calculating current flowing through a circuit and voltage drop?!

    I think you can answer the first question yourself, think about the word EACH. Adam
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