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Student Project - Flashing LED

Discussion in 'LEDs and Optoelectronics' started by c7fnt, Nov 21, 2013.

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  1. c7fnt


    Nov 21, 2013
    Hi All,

    I am a secondary school teacher with very very limited electronics knowledge.

    I have a student who is making a small juke box and wants some flashing LED's on it.

    I have inherited a large stock of various components and I am hoping I can make something using what I have got.

    I'd like to make a single circuit with approx 15 - 20 LED's.

    I have some circuit board material and a very good technician who can cut out the circuit on our CNC milling machine.

    I need help with the circuit design and what components I would need.

    Appreciate the time anyone spends to help!

  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    Jan 21, 2010
    The classical LED flasher solution is to use a 555.

    If you google "555 LED flasher" you should find lots of circuits.

    Depending on your power supply and the current you want to use for the LEDs, you may be able to drive them directly, or you may need to use one or more transistors to drive them.
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