When the full moon is shining and the wolves are howling, it's time for Halloween's spooky spectacle. The snickering grins of jack-o'-lanterns glow from lit porches. Kids skip down the block in spooky costumes, carrying bags full of candy and shouting "Trick or Treat!". The Nightmare Before Christmas is almost here...

Do you see dead people???

Alright Enough of that, in this Spooktacular video I am going to create an Arduino based 3D printed Halloween Décor.

It's super easy, fun and spooky....

3D Printing

3D Printing is a highly addictive hobby! This is the very first time I am using my 3D printer to print something electronics related. The STL files used in this project are all downloaded from www.Thingiverse.com. I have uploaded a copy of all the 3D Objects to my GitHub repository, the link is in the description below.

3D printing has changed my life. There are so many things you can do using a 3D printer. From designing 3D Models to printing them using the 3D printer has now become my new hobby. I've been a "maker" since I was 10 years old, and have always constructed and made my own stuff. 3D printing for me is a blessing. I am totally lost in the 3D printing heaven.

3D printing has changed my electronics workshop life forever. Before when I used to order parts, I always used to wonder if the parts would fit into my projects resources... but after I got my 3D printer... it doesn't matter at all, because if it doesn't fit - I could design and print it myself. The 3D printer was definitely "The Missing Piece" from my electronics workshop.

Schematic Diagram

Now that we have all our 3D Models printed, lets have a look at the component assembly.

The assembly is super simple. We just need to connect 4 Yellow LEDs to D2, D3, D4 and D5 pins of Arduino via 220ohm current limiting resistor.

Then connect the white LED to Analogue Pin D10 of the Arduino via a current limiting resistor.

That's it, as simple as that.

The Code

Now, lets have a look at the code that will drive the LEDs.

Lets start by defining all the variables.

Then in the setup section lets define all the pin modes.

To flash the LEDs I chose 5 different Flashing patterns:

1. All LEDs Flash Very Fast For 10 Seconds

2. All LEDs Flash Slowly For 10 Seconds

3. 2 LEDs Turn On and 2 LEDs Turn Off for 10 seconds

4. LED Chaser Circuit for 10 seconds

5. One LED Randomly Turn On for 10 seconds

The switch statement in the loop() section randomly picks up one of these patterns and runs it for 10 seconds.

The white LED also fades in and out after every cycle.

At the bottom of the code, I have defined all these 5 LED flashing patter in their respective functions.

EXPANDED TECHNICAL DETAILS

The project reveals the hidden layers of simple decorative electronics:

• Output layer: Using five 5mm LEDs, the Arduino acts as the driver for four yellow pumpkins and one white ghost.
• Lighting Pattern layer: The Arduino code contains several functions for different "Flashing patterns," such as rhythmic blinking, slow fading, and random flashes.
• Randomization Logic layer: Using the switch statement and random() function, the Arduino picks a different pattern every 10 seconds to keep the décor looking "alive."
• Sequential Display Sync Loop: The white LED in the ghost fades in and out independently after every cycle to create a truly spooky atmosphere.

Demo on Breadboard

After loading the code on an Arduino Nano this is how it looks like.

The white LED will go inside the Ghost and the Yellow LEDs will go inside the Pumpkins.

Humm, that looks promising, isn't it?

Assembling

Let's start by soldering the wires to the LEDs.

Then lets solder the Arduino Nano to a perf-board and then solder all the resistors to the board.

Next, lets soldered the LEDs to the D2, D3, D4, D5 and D10 pins of the Arduino via the current limiting resistors.

That's all you have to do for the electronics bit. Now, let's hot glue the perf-board inside the coffin, followed by all the LEDs to a wooden block.

Before putting the 3D printed components on the LEDs, let's do a quick test to verify everything works as expected. Look at that...

Now, one by one lets hot glue the 3D printed components to the plank. To finalize the setup, I added a few dry grass leaves to hide the wirings. That's it all done.

Final Demo

So this is how my final setup looks like.

Do comment and let me know if there are any scopes of improvement. Until then, Happy Halloween....

Future Expansion

This project has great potential for enhancement:

• OLED Spooky Dashboard Integration: Add a small OLED display inside the coffin to show the current "Spook Index" and pattern name.
• PIR Motion Trigger Support: Connect a PIR motion sensor to have the décor only "wake up" and start flashing when a visitor approaches.
• Cloud Interface Registration Support Synchronization: Add a WiFi module (ESP8266/ESP32) and link to a cloud dashboard to precisely control the "Spookiness" from your smartphone.
• Advanced Velocity Profile Customization Support: Add a small buzzer to give a final "BOO!" audio alert when motion is detected.

3D Printed Arduino Halloween Décor is a perfect project for any electronics enthusiast looking for a more interactive and engaging holiday tool!

Thanks

Thanks again for checking my post. I hope it helps you.

If you want to support me subscribe to my YouTube Channel: https://www.youtube.com/user/tarantula3

Video: https://youtu.be/Hxfhwr0Eoqk Visit

Full Blog Post: Visit https://diy-projects4u.blogspot.com/2023/10/Halloween2023.html

Code: https://github.com/tarantula3/Arduino-Halloween--Decor/blob/main/Code.zip Download

Schema: https://github.com/tarantula3/Arduino-Halloween--Decor/blob/main/Schema.fzz Download

STL Files:

Coffin: Download https://github.com/tarantula3/Arduino-Halloween--Decor/blob/main/Twist_Lock_Coffin.zip

RIP: Download https://github.com/tarantula3/Arduino-Halloween--Decor/blob/main/RIP.zip

Pumpkins: Download https://github.com/tarantula3/Arduino-Halloween--Decor/blob/main/Halloween_Pumpkins.zip

Pikachu: Download https://www.thingiverse.com/thing:4701289

Ghost: Download https://github.com/tarantula3/Arduino-Halloween--Decor/blob/main/Cute_Hug_Me_Ghost.zip

Instructables: https://www.instructables.com/3D-Printed-Arduino-Halloween-Décor/

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