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    element14 Presents

    Learn basic electronics, explore STEM subjects, get what you need to know to get started on electronics projects, and more.

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    The Learning Circuit
    sudo Sergeant
    The Ben Heck Show


    In today’s episode, we’re going to make a project using Diodes and Logic. Karen wants to build a skylight where there four LEDs, a white one for the moon and three colors (green, blue, and purple) for three different clusters of stars. It will have three switches.  If switch one is on, then the green stars and the moon will be on. Blue and purple would be off. If switch 2 is on then the blue stars and the moon will be on.  Green and purple would be off.   If switch 3 is on then the purple stars and the moon is on.  Green and Blue would be off.   To make this happen we’ll need some diodes and to draw out our circuits to see how we’ll have to wire it up, to make it work.

    Product NameManufacturerQuantityBuy KitBuy Kit

    2238 -  Battery Holder, PP3 (9V) x 1, Strap, Wire Leads


    Buy NowBuy Now

    LED, Purple, Through Hole, T-1 3/4 (5mm), 30 mA, 3 V, 405 nmVCC 1Buy NowBuy Now
    LED, Blue, Through Hole, T-1 3/4 (5mm), 20 mA, 3.2 V, 480 nmCREE1Buy NowBuy Now
    LED, Green, Through Hole, 5mm, 20 mA, 3.2 V, 527 nmCREE1Buy NowBuy Now
    LED, Cool White, Through Hole, T-1 3/4 (5mm), 20 mA, 3.2 V, 46.1 cdCREE1Buy NowBuy Now
    Through Hole Resistor, 330 ohm, 250 mWMULTICOMP1Buy NowBuy Now
    Toggle Switch, SPDT, On-Off-On, Panel, 5 AMULTICOMP1Buy NowBuy Now
    Standard Recovery Diode, 1 kV, 1 A, Single, 750 mV, 30 ANTE ELECTRONICS1Buy NowBuy Now