Make Halloween Prop Motion Detectors Work in the Dark

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Most halloween props use motion sensors that don't work in the dark! This DIY Halloween hack converts your prop to use a PIR motion detector module that triggers even in complete darkness.

This method should work with most halloween props that have a test button feature, even if the original prop doesn't have a motion sensor.

This is a DIY electronics project! You will need enough electronics knowledge to read a schematic and solder together the components as indicated. Creativity in hiding the sensor also helps!

Schematic:

Voltage Regulator:
Note: in the video I claimed the LM2596 can step voltage up or down. Apparently it only steps down, but it still worked great for me.

100K Potentiometer:

2N3906 PNP Transistor:
Not too picky here, any PNP transistor with "typical" characteristics is likely to work.

PC817 Optocoupler:
You can sub in a different part here too, just check the datasheet.

Resistors (if you don't already own a kit):

LED (optional):

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WARNING: ELECTRICITY IS DANGEROUS. I DO NOT GUARANTEE THAT THE INFORMATION IN THIS VIDEO IS ACCURATE OR SAFE AND TAKE NO RESPONSIBILITY FOR ANY HARM OR DAMAGE THAT COMES FROM UTILIZING THIS INFORMATION.

#halloween-hacks
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Excellent video! I liked how you made your own circuit for this one. If this was my project, I may have gone the easy route of using a small Arduino or attiny, but I really like your approach.

adamsoileau
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Impressive build! Looks like it came out great! Question: Why did you have batteries in as well as the supplied power from the soldered wires?

JayHanley
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Seems like a lot of work when you could just put a spotlight in front of it.

BobbyKhalloween