Version 1
    element14 presents
    DIY Motion Activated Snow Globe

    The Learning Circuit | element14 presents |  Project Videos



    As the usual follow up to the previous PIR lesson video, Karen shows how to use a PIR sensor in a project. This circuit uses a one-shot 555 timer to control a relay to turn on lights and fans to make a motion-activated snow globe. When motion is detected, the fans will blow snow around the light up tree inside the globe and then automatically shut off.


    Bill of Materials


    Product NameManufacturerQuantityBuy KitBuy Kit
    LM555CN - 555 Timer, Oscillator & Pulse Generator IC, TTL Compatible, Astable, Monostable, 4.5 V to 16 V, DIP-8ON SEMICONDUCTOR1Buy NowBuy Now
    Through Hole Resistor, 10 kohm, 250 mW, ± 1%TE Connectivity2Buy NowBuy Now
    Ceramic Disc Capacitor, 0.01 µF, 100 V, ± 20%, 5 mmVishay1Buy NowBuy Now
    Electrolytic Capacitor, 100 µF, 25 V, M Series, ± 20%, Radial Leaded, 6.3 mmVishay/Panasonic1Buy NowBuy Now
    Trimpot, Single Turn, Cermet, Top Adjust, 100 kohm, Through Hole, 1 Turns, 3306P-1-1043306P-1-104Bourns1Buy NowBuy Now
    2N4401, BJT, NPN, 40 V, 250 MHz, 625 mW, 600 mA, 300 hFEMULTICOMP PRO1Buy NowBuy Now
    Tactile Switch, 6mm, Black, Tall, Top Actuated, Through Hole, Round Button, 12 VDC, 50mAE-switch1Buy NowBuy Now
    G5V-1-DC5G5V-1-DC5 Signal Relay, 5 VDC, SPDT, 1 A, G5V-1 Series, Through Hole, Non LatchingOMRON1Buy NowBuy Now
    287-18001 PIR Sensor, 7 m, 5 V, 20 V, 120 °, 300 sMCM1Buy NowBuy Now
    RADIAL FAN, 60MM, 5VDC, 78L/MIN, 28DBA, HY_60Q05APSEPA2Buy NowBuy Now
    Addressable RGB LEDs, Clear, 5mm, 5pkMCM1Buy NowBuy Now
    Through Hole Resistor, 220 ohm, 400 mW, ± 1%Vishay1Buy NowBuy Now
    DC Power Connector, Jack, 5 A, 2.1 mm, Through Hole Mount, Through Hole, FC68148CLIFF ELECTRONIC COMPONENTS1Buy NowBuy Now
    Wire-To-Board Terminal Block, 5.08 mm, 2 Positions, 24 AWG, 14 AWG, 1.5 mm², ScrewWEIDMULLER4Buy NowBuy Now
    Prototype Board, Phenolic, 30 x 25 grid, 1.6 mm, 94 mm, 71 mmMulticomp1Buy NowBuy Now
    AC/DC Power Supply, ITE, 1 Output, 10 W, 5 V, 2 A, 28-19317PRO ELEC1Buy NowBuy Now
    Board-To-Board Connector, 2.54 mm, 4 Contacts, Male Header, 1 RowsMulticomp1Buy NowBuy Now


    Additional Parts:


    Product Name

    4.5VDC LED product (White RGB LED tree from Dollar Tree)

    Clear tube or globe with large opening

    small styrofoam "snow" balls

    Wire mesh (mine was made from a kitchen pan splatter screen)