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Raspberry Pi 4 Turns Truck into Huge Dot Matrix Printer

Raspberry Pi 4 Turns Truck into Huge Dot Matrix Printer


Raspberry Pi Turns Truck into Huge Dot Matrix Printer


There’s always room for creativity and innovation. Meet Ryder, a maker who has developed a unique road printing system using a Raspberry Pi. This fascinating project combines water, a Raspberry Pi, and precise control to create custom messages on roads. In this blog, we will explore the intricacies of Ryder’s road printing system and how the Raspberry Pi plays a crucial role in making it happen.

The Water-Based Printing System:

Ryder’s road printing system utilizes water droplets to form letters and create custom messages on roads. Mounted on the back of a truck, the system is carefully controlled using a web interface from inside the cabin. As messages are parsed through the web interface, a series of tubes directs water precisely to shape the desired letters, much like a dot matrix printer.

Youtube Video Here

The Role of Raspberry Pi:

Using a web interface users can connect from their web browsers and input new messages for printing. The Raspberry Pi accepts these commands and triggers the water-based printing system accordingly. Although the project’s code hasn’t been released, Ryder provides insights into its functionality.

Design and Assembly:

In a video shared by Ryder on their official channel, Ryder Calm Down, the design and assembly process of the road printing system are showcased. The system incorporates hoses, valves, and solenoids, which control the release of water when directed by the Raspberry Pi. A bucket of water connected to the printer system makes it convenient for refilling.

The Printing Process:

Once a user inputs a new message through the web interface, the system converts the text into an image. This image is then processed to determine the precise control signals required for printing with the solenoids. Through careful coordination, the water droplets are released in the desired positions, forming the letters and messages on the road surface.

The Raspberry Pi acts as the brain of the operation, ensuring that the timing and positioning of the water droplets are accurate. This coordination allows the system to print messages with clarity and precision. The water-based printing system combines the principles of fluid dynamics and digital control to create an intriguing blend of art and technology.

Future Possibilities and Impact:

Ryder’s road printing system opens up possibilities for innovative messaging and communication. It could be utilized for various purposes, such as advertising, temporary road markings, or even creative expressions during special events or celebrations. The water-based printing system offers an environmentally friendly alternative to traditional methods of road marking or signage.

Furthermore, this project showcases the potential of Raspberry Pi as a versatile platform for creative endeavors. It highlights the accessibility and affordability of Raspberry Pi, making it a suitable choice for makers and hobbyists looking to explore unique projects.


Ryder’s road printing system is a remarkable example of creativity and engineering prowess in the Raspberry Pi community. By combining the power of a Raspberry Pi with precise control mechanisms and water droplets, this project brings custom messaging to the streets in a unique way. While the project’s code remains undisclosed, Ryder’s video provides a captivating glimpse into the design, assembly, and final implementation of this water-based printing system.

The road printing system demonstrates the potential of Raspberry Pi as a platform for innovation and showcases the fusion of art and technology. As we continue to explore the boundaries of what can be achieved with Raspberry Pi, projects like this inspire us to think creatively and push the limits of what is possible.


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