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PANHEAD: The Undead Maintenance Technician

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PANHEAD: The Undead Maintenance Technician

A DIY Halloween Animatronics Project

Project Overview

Meet Panhead, an undead industrial maintenance technician who's been brought back from the grave to keep the conveyors running—or perhaps make them a little more terrifying!

Panhead started life as an ordinary $20 Halloween skeleton. With a handful of hobby servos, an Arduino Mega, custom 3D-printed components, and some creative mechanical modifications, he was transformed into a demonic animatronic character capable of turning his head, moving his jaw and claws, and delivering sinister maintenance advice.

The goal was to build an entertaining, low-cost Halloween animatronic using readily available electronic components, basic mechanical fabrication techniques, and accessible animation software.

The Build

1. Modifying the Skeleton

The project began with a $20 Halloween skeleton that provided the basic structure for Panhead.

To create his demonic appearance, I added custom 3D-printed horns and claws. The original skeleton was then modified to accommodate servo motors and mechanical linkages while maintaining its overall appearance.

Rather than building an entirely new frame, I wanted to demonstrate how an inexpensive decoration could be repurposed into a functioning animatronic character.

2. Building the Mechanical Systems

Panhead uses four independently controlled hobby servos to animate his head, jaw, and claws.

The neck assembly was modified to allow left and right head rotation. A dedicated servo was installed using a custom 3D-printed mounting bracket, with mechanical arms connecting the servo to the head. This arrangement allows the head to turn during performances.

For the jaw, a second servo was mounted near the neck and connected to the lower jaw using a piano-wire linkage. As the servo rotates, the linkage opens and closes the mouth, giving Panhead the ability to appear to speak along with recorded dialogue.

Two additional servos operate the right and left claws independently, adding another layer of movement and personality to the character.

These modifications required a combination of custom-fabricated components, mechanical adjustments, and experimentation to achieve the desired range of motion.

3. Electronics and LED Lighting

An Arduino Mega serves as the controller for Panhead's four servo motors and LED eye lighting.

The control configuration consists of:

• Servo 1: Neck rotation

• Servo 2: Jaw movement

• Servo 3: Right claw movement

• Servo 4: Left claw movement

• Custom Input (Pin 10): LED eye control

The skeleton originally included illuminated eyes activated by a factory "try me" button.

Rather than replacing the original lighting assembly, I reused the existing JST connector to integrate the LEDs with the Arduino. Resistors were also added to reduce their brightness and create a more subtle, sinister glow.

This allowed the original lighting to become part of Panhead's electronic control system without requiring an entirely new LED assembly.

4. Programming and Animation with Bottango

Instead of writing a custom animation program from scratch, I used Bottango, an animation platform designed for controlling servos and other electronic devices.

Bottango communicates with the Arduino Mega and allows individual movements to be configured, recorded, and combined into animated sequences.

Each of Panhead's four servos can be controlled independently, making it possible to coordinate head rotation, jaw articulation, and claw movement during a performance. The LED lighting is also incorporated through a custom input assigned to Arduino pin 10.

One of the most useful features of Bottango is the ability to synchronize servo movements with audio. This made it possible to animate Panhead's jaw alongside his recorded dialogue, giving him the appearance of actually speaking.

The software also makes it easy to adjust movements and experiment with different animation sequences without rewriting the controller code for every change.

5. Giving Panhead a Voice

Of course, a demonic maintenance technician needs an appropriately sinister voice!

I used ElevenLabs text-to-speech technology to create Panhead's character voice. His dialogue combines industrial maintenance humor with a slightly unhinged robotic personality.

The generated audio was imported into Bottango, where I recorded and adjusted the servo movements to match the dialogue.

By combining synthesized speech with synchronized jaw movement, head rotation, and claw animation, Panhead became more than a moving Halloween decoration—he became a character with his own personality.

6. Creating the Halloween Demonstration Video

For the final presentation, I wanted to give Panhead an environment that matched his personality.

I recorded his animated performance and used CapCut with a green screen to place him into a haunted setting.

This allowed me to combine the physical animatronic with digital video effects while keeping the actual robot build relatively simple and inexpensive.

The final demonstration features Panhead delivering one of his favorite maintenance observations:

"They said the conveyor was making strange noises… GOOD! IT'S LEARNING! MWAHAHAHA!"

The video demonstrates how the mechanical systems, electronic controls, synthesized voice, and animation software work together to bring the character to life.

Project Highlights

• Repurposed $20 Halloween skeleton

• Arduino Mega microcontroller

• Four independently controlled servo motors

• Servo-driven neck rotation using a custom 3D-printed mount and mechanical arms

• Articulated jaw with a piano-wire linkage

• Independently animated left and right claws

• Custom 3D-printed horns and claws

• Modified LED eyes using the original JST connector and Arduino pin 10

• Bottango motion sequencing and audio synchronization

• ElevenLabs AI-generated character voice

• CapCut video editing and green-screen Halloween effects

• Affordable, accessible DIY mechatronics and animatronics

Conclusion

Panhead started as a simple Halloween decoration and evolved into a four-servo animatronic character through a combination of electronics, 3D printing, mechanical fabrication, and animation software.

One of the main goals of this project was to explore how inexpensive components and freely accessible development tools can be combined to create something entertaining without the complexity or expense of commercial animatronic systems.

The project also demonstrates several fundamental mechatronics concepts, including servo actuation, mechanical linkages, microcontroller-based control, and coordinated motion.

Most importantly, it was a fun opportunity to experiment, solve mechanical challenges, and give an otherwise ordinary Halloween skeleton a rather unusual personality.

And if Panhead teaches us anything, it's that preventive maintenance is important.

Because sometimes, when the machines start making strange noises… they might be learning.

MWAHAHAHA!

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