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Discussion Starter · #1 ·
This was my Halloween display for 2015. It's an Arduino-controlled, motion-sensor-triggered, choose-your-own pepper's ghost experience, with an automatic candy dispensing machine at the end.


Here's the scary version:


Here's the happy version:

Candy Machine:

Exterior:

Inner Workings:

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Audio equipment

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You can see the arduino (and a mess of wires) but the candy machine only needs the arduino, the red arcade button, the servo, and some MDF.
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The resistance created by the stack of Hershey bars was too much for a regular servo so I bought a Hitec HS-322HD.
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To get the most out of it I powered it separately from the Arduino at 6V
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The candy machine worked but I'd like to make it more robust. I had to limit the stack to ~10 candy bars to get dependable results. I'd like to make the weight of the stack a non-issue. Maybe a stepper motor w/ big gear teeth could separate/support the stack? Any ideas?
 

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Loved this. I've thought about building a candy dispensing machine for years, but never followed through with it. What were you projecting onto? The see through effect was great. Really enhanced the ghost. I projected the atmosfearfx witch scenes on a shower curtain this year. Was really cool, but also obvious what it was. The younger ones loved it. Where was the projector and what kind was it? (I'm trying to determine if lower lumen cheap projectors are useful or not)
 

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Discussion Starter · #9 ·
Thanks. The screen was the only semi-see-thru mesh I could find at the fabric store. I hot glued it to a pvc frame that pressure fit into the door frame. The projector was placed down a hallway off to the right (~10'). You can see how severe the angle was by how the image projects through the scrim and onto the wall to the left of the door. The projector had a keystone adjuster that was good enough to straighten it out. I borrowed the projector so i don't know what model it was (Epson).
 

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Amazing work! Very clever.

I noticed there was a "wait" button. How did the device re-set itself? Was there a timer or motion sensor that indicated the stairway was occupied, thereby triggering the red "wait" light?
 

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Discussion Starter · #15 ·
Amazing work! Very clever.

I noticed there was a "wait" button. How did the device re-set itself? Was there a timer or motion sensor that indicated the stairway was occupied, thereby triggering the red "wait" light?
Basically, yes. The Arduino code was a big switch case sequence. When you triggered the first (of 3) motion sensors, the video #1 would fire and the "wait" red light would turn on. Triggering the 3rd sensor would fire the "startle" video and activate the candy machine. This would loop until the 1st sensor was tripped again, the "we'll save a plot.." audio would fire and the whole thing would reset.
 
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