CASE STUDY
Nelsons Guest Book
I created a custom audio guestbook using a vintage telephone handset and Teensy microcontroller, enabling wedding guests to leave digital messages.
I created a custom audio guestbook using a vintage telephone handset and Teensy microcontroller, enabling wedding guests to leave digital messages.
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CASE STUDY
Nelson's Audio Guest Book
I created a custom audio guestbook using a vintage telephone handset and Teensy microcontroller
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The Challenge
For Mr. Nelson’s wedding, I was asked to create a modern guestbook experience—something more interactive and emotionally resonant than a traditional notebook. Inspired by the rising trend of vintage-style audio guestbooks, I set out to build a custom solution that combined nostalgia with reliable, DIY-friendly technology. The goal was to offer guests a fun, familiar way to leave voice messages, while keeping the overall build cost-effective and portable.
The Solution
Using a Teensy 4.0 microcontroller and high-quality audio shield components, I engineered a fully functional audio guestbook housed inside a repurposed rotary telephone. I followed the excellent walkthrough from this guide, adapting it for improved durability and simplified setup. When guests lifted the receiver, the system automatically began recording their message, which was then saved as a numbered WAV file to an SD card. I customized the Arduino code to enhance file handling and added clear labeling for post-event file retrieval. Careful soldering and component integration ensured reliable function throughout the event.
The Result
The final product blended vintage charm with seamless functionality. Guests loved the novelty of recording messages through an old-school handset, and the couple now has a collection of personal voice notes to revisit for years to come. This project is a great example of how I use both software and hardware to create unique, emotionally engaging experiences—whether for a wedding or a more technical setting.

Client:
Brett nelson
Industry:
Custom Solutions
Work done:
Coding, 3D, Soldering
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