BrickPi Bookreader: Automate Kindle Reading with Raspberry Pi and LEGO Mindstorms

Picture a compact robot that turns the pages of your Kindle, captures each image, converts it to text, and reads it aloud—all powered by a Raspberry Pi and LEGO Mindstorms. The BrickPi Bookreader turns that vision into a reality.

Step 1: Parts Required

• Raspberry Pi (Model B or newer)
• BrickPi interface board
• Official Raspberry Pi camera module
• BrickPi power pack
• SD card with the latest Raspberry Pi OS installed
• Wi‑Fi dongle (for remote access and updates)
• LEGO Mindstorms NXT motor (or equivalent servo)
• LEGO beams and connectors to build the platform

Step 2: Why Build This?

While commercial book scanners exist, they are often bulky, costly, or difficult to set up for home use. The BrickPi Bookreader offers a lightweight, affordable alternative that leverages the processing power of the Raspberry Pi and the precise mechanical control of LEGO Mindstorms.

Key components:

• Software stack: High‑resolution capture with the Pi camera, OCR via Tesseract, and text‑to‑speech with eSpeak.
• Mechanism: An NXT motor‑driven page‑turner built from LEGO beams.

After extensive research, we found no turnkey solutions that fit our budget and skill level. Existing systems—such as Google’s Book Scanner or Scanbot—are either corporate‑grade or require complex precision timing. LEGO’s modular nature made it an ideal choice for prototyping.

Step 3: Setting Up the Camera

The Pi camera delivers excellent image quality and is straightforward to install. Since the module has fixed focus at infinity, manual adjustment is necessary for close‑up shots of a tablet or book.

• Connect the camera to the CSI port.
• Adjust the focus screw to achieve sharpness at 10–12 inches.
• Consult these community guides for detailed instructions:
  • Focus adjustment guide 1
  • Focus adjustment guide 2

Step 4: Testing the Camera

With the camera mounted at the desired height (typically 10.5 inches above the screen), capture a test image:

raspistill -o image.jpg

Verify that image.jpg appears in your working directory and that the entire screen is in focus. Adjust angle or focus if necessary. For best OCR performance, use black text on a white background and ensure the font size is large enough.

Step 5: Configuring Text‑to‑Speech

eSpeak is a lightweight TTS engine suitable for the Pi. While the voice may sound robotic, it reliably renders the captured text.

Confirm audio output:

aplay /usr/share/sounds/alsa/*

If you hear the test tones, the audio subsystem is ready. For troubleshooting, refer to Raspberry Pi audio setup guides.

Step 6: Building the Page‑Turner

The core of the robot is a simple LEGO platform that uses an NXT motor to rotate a lever that flips the book’s page. The design is fully modular, allowing easy adjustments for different book sizes. Key steps include:

• Mount the motor to a stable frame.
• Attach a lightweight lever that contacts the page edge.
• Program the BrickPi to trigger the motor once an image is captured.

For detailed construction instructions, consult the BrickPi documentation and LEGO Mindstorms forums.

Step 7: Bringing It All Together

With the camera, TTS, and page‑turner in place, the system runs a simple pipeline: capture → OCR → text → TTS. The Raspberry Pi can be accessed via SSH or a web interface for remote control, and the entire setup can be powered from the BrickPi power pack.

To test the complete workflow, place a Kindle or e‑book on the platform, run the script, and listen as the robot reads aloud.

By combining off‑the‑shelf components with open‑source software, the BrickPi Bookreader demonstrates how a hobbyist can create a functional, automated reading assistant at a fraction of the cost of commercial devices.