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Star Wars - R2D2 Cake for Nephew

Discussion in 'General Electronics Discussion' started by HvEdtg83, Dec 22, 2013.

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  1. HvEdtg83


    Dec 19, 2013
    I'm trying to figure the easiest way to wire up a R2D2 cake we are making for my nephew. The electronics would be worked into the cake and insulated from it.

    I would like to have a button that he can push which would simultaneously trigger a red LED (mounted in a bezel) and initiate a 9V sound recording module (from Radioshack) that I would use beforehand to record the R2D2 sound effect from one of the movies.

    Ideally the red LED would come on and stay on, and the recording module would play back only once unless the button was pressed again.

    I'm thinking it can be done with
    - battery + battery holder
    - recording module
    - resistor
    - red LED + bezel
    - on/off push button

    Would it be possible for me to wire up the recording module as normal and simply insert the LED portion of the circuit in between the battery and the recording module?
    Any advice is appreciated
  2. Harald Kapp

    Harald Kapp Moderator Moderator

    Nov 17, 2011
    The LED+resistor would have to be in parallel to the sound module.
    A pushbutton alone will not work. It will be on only as long as you press it. The LED and the sound will turn off as soon as you release the pushbutton. You will need a switch or a pushbutton with latching action: press once = on, press a second time = off. The sound module would have to be set up such that it plays the sound only once. Whether this is possible depends on the module.
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