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A button press starts the Vomit Comic Robot: a Raspberry Pi runs software that chooses a comic layout, fills its panels with randomly selected hand-drawn images, saves the finished comic, and sends it to a thermal receipt printer. The pictures are random, but the panel arrangement encourages people to imagine a story.
How the robot makes and prints a comic
- A visitor presses the button. The input starts a generation-and-print cycle, while LEDs provide part of the physical interaction.
- Processing builds the page. The sketch selects a comic layout and places images from Cadin Batrack’s library of drawings into its panels. The original collection was reported to contain about 100 drawings. Image data helps fit drawings to panel dimensions; Batrack’s project page says an image larger than its panel is cropped.
- Python connects the pieces. A Python script manages the button and LEDs, communicates with the Processing sketch, loads the completed image, and sends it to the printer.
- The Pi saves and prints the result. The composite is saved as a PNG on the Raspberry Pi’s SD card and sent to a USB thermal receipt printer. The documented prints include the date, comic number, and event name.
The build described in Raspberry Pi Official Magazine’s project feature uses a Raspberry Pi 3, a USB mini thermal receipt printer, LEDs, a button, and a laser-cut plywood enclosure. The image-generation sketch is written in Processing, with Python handling input and printer communication.
Why random panels can still feel like a story
The machine does not need to write a plot for the comic to feel narrative. A sequence of panels puts images beside and after one another, so readers naturally look for cause, reaction, and continuity. Batrack described the effect this way: “Although images are selected and placed randomly, the comic panel format suggests relationships between elements. Our minds create a story where there is none in an attempt to explain visuals created by a non-intelligent machine.”
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#1 Best Overall
- Multiple Functions: Each of the six legs has three motors, the rotatable head has a camera and an ultrasonic distance sensor (Assembly required) (Raspberry Pi and Battery NOT included)
- Detailed Tutorial: Provides step-by-step assembly guide and complete Python code (The download link can be found on the product box) (No paper tutorial)
- Compatible Models: Raspberry Pi 5 / 4B / 3B+ / 3B / 3A+ (2B / 1B+ / 1A+ / Zero 2 W / Zero W / Zero 1.3 is also compatible but needs extra parts) (NOT included in this kit)
- Control Methods: Controlled wirelessly by your Android phone or tablet, iPhone (with Freenove App) and computer (run Windows, macOS or Raspberry Pi OS)
- Battery NOT Included: Please refer to the downloaded tutorial to buy
What you need to recreate the idea
The documented build gives component categories, not a complete, currently verified shopping list. Its core elements are:
- A Raspberry Pi to run the generation and control software. The documented machine used a Raspberry Pi 3; the project sources do not establish which current board is best.
- A USB thermal receipt printer and matching paper.
- A button and LEDs for the visitor controls and feedback.
- An enclosure, documented as laser-cut plywood.
- Processing and Python code, plus a collection of drawings and the data used to fit them into panels.
The project descriptions do not identify the printer’s brand or model, paper width, or a verified list of replacement parts. Before buying a printer for a recreation, confirm that its host connection, supported image format, paper size, and driver workflow will work with the software and enclosure you plan to use. The original build’s use of USB is a useful starting point, not proof that every USB receipt printer is compatible.
Rank #2
- AI-Powered Raspberry Pi Smart Car — PiCar-X: PiCar-X brings AI learning to life — powered by Openclaw and multi-LLMs including ChatGPT, Gemini, Grok, DeepSeek, Qwen, Doubao, Ollama (Local LLMs), and compatible with many more AI platforms. Featuring OpenCV, MediaPipe, TTS & STT, PiCar-X enables true AI vision and voice interaction — it can see, listen, talk, drive and think like an intelligent companion. Ideal for students (10+), educators, and engineers, PiCar-X is the perfect gateway to explore AI, robotics, and machine learning on Raspberry Pi 5/4/3B+/3B/Zero 2W (Raspberry Pi not included)
- Engaging Interactions with Multi-LLMs: PiCar-X, powered by Openclaw and multi-LLMs — including ChatGPT, Gemini, Grok, DeepSeek, Qwen, Doubao, and Ollama (Local LLMs) — and compatible with many other AI platforms, supports voice interaction and visual recognition to make the robot smarter and more responsive. Users can enjoy natural AI conversations, solve math problems through the camera, and interpret gestures, unlocking a world of diverse and fun AI-driven interactions
- Feature-rich and Adaptable: PiCar-X offers engaging applications like line following and obstacle avoidance, supports TTS (Text-to-Speech) and STT (Speech-to-Text) for interactive voice control, and includes a camera for video and vision recognition. It also comes with various sensors, while its customizable design enables a wide range of creative AI and robotics projects
- Versatile Programming Options: Catering to users of all skill levels, PiCar-X supports both Python and Scratch programming languages, allowing for flexible learning and skill development
- Simplified Assembly & Support: PiCar-X is perfect for beginners, yet learning with experienced users is recommended for best results. It comes with easy assembly instructions and forum support for smooth project completion
Ways to adapt the comic printer
Use your own drawings
Batrack described the project as replicable with the comic-generating code and intended for makers to add their own images. A new drawing library can change the look and subject matter without changing the basic idea: select a layout, place images in its panels, save the composite, and print it.
Consider themes as a future extension
Batrack mentioned a dial that could let visitors choose themes such as food, animals, or nature. That was an idea for a possible future version, not a feature of the documented build. A themed version would need some way to group or filter the image library before panel selection.
Rank #3
- Raspberry Pi AI Robot: powered by Raspberry Pi (5/4B/3B+/3B/Zero 2W), features 12 servos and sensors for vision, hearing, and touch. Integrated with ChatGPT-4o, it responds to complex queries. With app control and FPV, users can manage and see its view in real-time. It supports Python programming
- Realistic Movements: 12 powerful servos enable 32 actions, including walking, sitting, standing, shaking its head, wagging its tail, and performing playful tricks, closely mimicking a real and providing an engaging experience
- Rich Sensor Suite for Interactive Experiences: features ultrasonic, touch, gyroscope, sound, camera, speaker and microphone. These provide it with advanced hearing, vision, and touch, enabling it to see, detect obstacles, respond to touch, and recognize sounds, making interactions highly engaging
- Engaging Interactions with ChatGPT-4o: with ChatGPT-4o enables voice interactions and visual recognition, making it smarter and more responsive. Users can have natural conversations, solve math problems via the camera, and interpret gestures, creating diverse and fun interactions
- Comprehensive Learning Resources and Support: offers detailed online documentation, video tutorials, prompt technical support, and an active forum community, ensuring beginners can easily complete all projects and enjoy a great experience
Simplify the machine for other printouts
The magazine feature notes that printing content other than randomly generated comics could be simpler because it would not need the Processing sketch. A project that prints a prepared image could focus on loading that image and delivering it through the printer workflow.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What the project is—and is not—documented to prove
The project pages describe a working event-oriented comic printer and its software flow, but they do not provide printer performance measurements, a complete replacement-parts specification, or comparative tests of receipt printers. Treat the Raspberry Pi 3 and printer setup as the historically documented implementation, not as a guarantee that an unverified modern printer will work without adaptation.
Quick Recap
Rank #4
- AI-Powered Raspberry Pi Robot Dog — PiDog: Powered by Raspberry Pi (5/4B/3B+/3B/Zero 2W), OpenClaw, and multi-LLMs like ChatGPT, Gemini, Grok, DeepSeek, Qwen & Ollama. With 12 servos, camera, gyroscope, hearing & touch sensors, PiDog can see, listen, talk, move, and interact intelligently. Supports OpenCV, MediaPipe, TTS & STT, app control, FPV & Python. A great STEM robotics gift for students, makers & tech enthusiasts—perfect for birthdays and holidays. (Raspberry Pi not included)
- Realistic Dog-like Movements: PiDog's 12 powerful servos enable 32 dog-like actions, including walking, sitting, standing, shaking its head, wagging its tail, and performing playful tricks, closely mimicking a real dog and providing an engaging experience. This is an AI development robot product designed for engineers, suitable for ages 15 and above
- Rich Sensor Suite for Interactive Experiences: PiDog features ultrasonic, touch, gyroscope, sound, camera, speaker and microphone. These provide it with advanced hearing, vision, and touch, enabling it to see, detect obstacles, respond to touch, and recognize sounds, making interactions highly engaging
- AI-Powered Interactions with OpenClaw & Multi-LLMs. PiDog combines voice, vision, and gesture recognition for immersive AI experiences. Powered by OpenClaw and multi-LLMs like ChatGPT, Gemini, Grok, DeepSeek, Qwen, Doubao, and Ollama (local LLMs), it can understand questions, respond naturally through TTS & STT, recognize math problems, interpret hand gestures, and hold smart conversations. OpenClaw also enables customizable AI behaviors and personalized robotics development, helping users create their own intelligent robotic companion
- Comprehensive Learning Resources and Support: PiDog offers detailed online documentation, video tutorials, prompt technical support, and an active forum community, ensuring beginners can easily complete all projects and enjoy a great experience
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