DIY Motion Activated Snow Globe
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 Name | Manufacturer | Quantity | Buy KitBuy Kit |
|---|---|---|---|
| LM555CN - 555 Timer, Oscillator & Pulse Generator IC, TTL Compatible, Astable, Monostable, 4.5 V to 16 V, DIP-8 | ON SEMICONDUCTOR | 1 | Buy NowBuy Now |
| Through Hole Resistor, 10 kohm, 250 mW, ± 1% | TE Connectivity | 2 | Buy NowBuy Now |
| Ceramic Disc Capacitor, 0.01 µF, 100 V, ± 20%, 5 mm | Vishay | 1 | Buy NowBuy Now |
| Electrolytic Capacitor, 100 µF, 25 V, M Series, ± 20%, Radial Leaded, 6.3 mm | Vishay/Panasonic | 1 | Buy NowBuy Now |
| Trimpot, Single Turn, Cermet, Top Adjust, 100 kohm, Through Hole, 1 Turns, 3306P-1-1043306P-1-104 | Bourns | 1 | Buy NowBuy Now |
| 2N4401, BJT, NPN, 40 V, 250 MHz, 625 mW, 600 mA, 300 hFE | MULTICOMP PRO | 1 | Buy NowBuy Now |
| Tactile Switch, 6mm, Black, Tall, Top Actuated, Through Hole, Round Button, 12 VDC, 50mA | E-switch | 1 | Buy NowBuy Now |
| G5V-1-DC5G5V-1-DC5 Signal Relay, 5 VDC, SPDT, 1 A, G5V-1 Series, Through Hole, Non Latching | OMRON | 1 | Buy NowBuy Now |
| 287-18001 PIR Sensor, 7 m, 5 V, 20 V, 120 °, 300 s | MCM | 1 | Buy NowBuy Now |
| RADIAL FAN, 60MM, 5VDC, 78L/MIN, 28DBA, HY_60Q05AP | SEPA | 2 | Buy NowBuy Now |
| Addressable RGB LEDs, Clear, 5mm, 5pk | MCM | 1 | Buy NowBuy Now |
| Through Hole Resistor, 220 ohm, 400 mW, ± 1% | Vishay | 1 | Buy NowBuy Now |
| DC Power Connector, Jack, 5 A, 2.1 mm, Through Hole Mount, Through Hole, FC68148 | CLIFF ELECTRONIC COMPONENTS | 1 | Buy NowBuy Now |
| Wire-To-Board Terminal Block, 5.08 mm, 2 Positions, 24 AWG, 14 AWG, 1.5 mm², Screw | WEIDMULLER | 4 | Buy NowBuy Now |
| Prototype Board, Phenolic, 30 x 25 grid, 1.6 mm, 94 mm, 71 mm | Multicomp | 1 | Buy NowBuy Now |
| AC/DC Power Supply, ITE, 1 Output, 10 W, 5 V, 2 A, 28-19317 | PRO ELEC | 1 | Buy NowBuy Now |
| Board-To-Board Connector, 2.54 mm, 4 Contacts, Male Header, 1 Rows | Multicomp | 1 | Buy 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) |
