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How can I get this switch to function

Discussion in 'General Electronics Discussion' started by Tomnolan.x, Apr 3, 2012.

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  1. Tomnolan.x


    Apr 3, 2012
    LEDs on an ac supply?

    I am really new to electronics, currently at school studying physics and I want to proceed to electronics later on in life. I'm currently working project that involves a blender LEDs and air pump and fish!

    Basically, I've converted a blender into a fish tank. I've opened it up and gutted out the housing which I want to use to house my air pump and LEDs.
    The blender was already equipped with a rotary switch which has three different positions. Two of them constant and one which you have to hold on.

    I want to connect the air pump and the LEDs so that when the switch is in position one, just the pump is on and when the switche is in position two, the air pump and the LEDs are on.
    I am not comfortable with AC circuits, who h I understand I will have to use due to me plugging it into the domestic supply. Will it be possible for me to power LEDs of a domestic supply and will I need specific type of LEDs?

    with an AC supply, can I split the supply from on plug so the pump and LEDs are both connected to the same circuit but are dependant on the rotary switch?
    Last edited: Apr 3, 2012
  2. Harald Kapp

    Harald Kapp Moderator Moderator

    Nov 17, 2011
    You cannot power standard LEDs from AC, let alone high voltage. You need a rectifier plus a current limiter. Here is an example i googled: (seárch term: power led from ac)

    Or you could use one of the few AC high voltage LEDs like acrich (

    How you have to wire everything up to the rotary swicth depends on the switch, how it is constructed. Possibly yes, but I cannot tell from here.

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