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Bit of a mess...

Discussion in 'General Electronics Discussion' started by enjo, Mar 31, 2011.

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  1. enjo

    enjo

    2
    0
    Mar 25, 2011
    Can anyone help sort this out?
    I am an electronics noob, I would really appreciate any help you can offer. In return I'll offer a £10 paypal gift for the best solution for me! :)

    I am trying to have a speaker (BZ1) emit an adjustable tone, controlled by VR2.
    With the output being controlled by VR1 in terms of volume.

    The speaker should also be able to be independently switched on via SW3, once activated it should sound intermittently (beeper/siren) for 20 seconds then cease.

    The speaker I would like to use is an 80W 8 ohm but I am restricted to 12V, I'm open to suggestions on this.

    [​IMG]

    This was created with livewire, as you can see... it is not what I want!

    Thanks,
    enjo
     
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