Smartphones were never really meant to be your AI sidekick. They juggle notifications, social feeds, and a dozen background services before they ever get around to being “smart.” Meanwhile, the first wave of dedicated AI gadgets from companies like Humane and Rabbit showed up with big promises, closed ecosystems, and short lifespans. When the money dried up, so did the hardware. A little Raspberry Pi Zero 2 W with a Whisplay HAT quietly sidesteps all of that. It is a DIY AI chat device that you own outright, that you can fix, reflash, or repurpose, and that can talk to Gemini, Claude, or ChatGPT without caring which startup is still solvent this quarter.

Instead of betting on a single company’s cloud, Whisplay treats AI as a replaceable part. The hardware gives you a screen, mic, speaker, and buttons, and leaves the “brain” up to you. If Gemini changes pricing, Claude adds features, or ChatGPT pulls ahead again, you can swap backends with a config file or a bit of code, not a new gadget. In a landscape where AI hardware keeps arriving as disposable, subscription-tethered experiments, this little open, modular box feels like the first honest attempt at a personal AI terminal that will not vanish the moment a runway spreadsheet turns red.

Designer: Jdaie

At its very core, the Whisplay HAT is a clever little I/O board designed to give a Pi a face and a voice… simply put. It bolts directly onto the 40-pin GPIO header and provides everything needed for a conversational interface. You get a surprisingly crisp 1.96-inch color LCD for displaying text or animations, a WM8960 audio codec driving an onboard microphone and speaker, an RGB status LED, and a few programmable buttons for user input. It is not a standalone computer, but a purpose-built terminal that turns the Pi Zero into something you can actually talk to. The entire package matches the Pi Zero’s footprint, making for a compact and tidy build that feels intentional, not like a messy science fair project.

The choice of the Raspberry Pi Zero 2 W as the platform is telling. With its quad-core 1 GHz ARM Cortex-A53 CPU and just 512MB of RAM, it is nobody’s idea of a powerhouse. That is precisely the point. The Pi is not running the large language model; it is just a client. Its job is to capture audio, send a request over Wi-Fi, and then play back the response. This thin-client architecture is incredibly efficient, requiring minimal power and processing, which is perfect for an always-on desk companion. The heavy lifting is outsourced to the cloud API of your choice, leaving the Pi to handle the simple, tangible task of being the physical interface between you and the AI.

The actual magic is a simple, elegant pipeline that you control completely. Your code on the Pi captures audio from the Whisplay’s microphone, uses a speech-to-text engine to transcribe it, and then packages that text into an API call to Gemini or another LLM. When the response comes back, a text-to-speech engine converts it back into audio and plays it through the onboard speaker, while the LCD can show the text or a thinking animation. You can point it at Google’s Gemini API today and switch to a local Ollama server running on a spare Raspberry Pi 5 tomorrow if you feel like it. What’s so perfect about the Whisplay HAT is that it assumes companies and models will come and go, so it treats the LLM as a pluggable component. Today, that might be Gemini, Claude, or ChatGPT. Tomorrow, it might be some open model running on your own server. Either way, the little chatting device on your desk stays the same, happily piping audio in and out while you swap brains on the backend.

That brings us to the real kicker. The Whisplay HAT costs about thirty-five dollars. Paired with a fifteen-dollar Pi Zero 2 W, you have the core of a highly capable, endlessly customizable AI device for fifty bucks. Compare that to the seven-hundred-dollar Humane Ai Pin or the two-hundred-dollar Rabbit R1, both of which are functionally just API clients tied to a single, proprietary service. This DIY approach is not just cheaper; it represents a fundamentally different, more sustainable philosophy. It is a platform for tinkering and ownership, not a sealed product designed to be consumed and eventually discarded. It is a starting point, and in a field moving this fast, a good starting point is infinitely more valuable than a dead end.

The post The Cheapest Personal AI Device You Can Own: $50 Raspberry Pi Whisplay Runs Gemini, Claude, and ChatGPT first appeared on Yanko Design.