Psi-Pi: Voice-Controlled Chatbot Powered by ChatGPT
Psi-Pi is a fully self-contained AI voice assistant powered by a Raspberry Pi. Housed in a custom 3D-printed enclosure, it listens for voice commands using a USB microphone, responds using OpenAI’s GPT model, and speaks through a MAX98357 amplifier and Echo Pop speaker. The system is powered by a 3S LiPo battery regulated by a buck converter, with active cooling from dual 5V fans. A potentiometer allows manual volume control. The compact, portable design makes Psi-Pi a functional and creative fusion of hardware, software, and artificial intelligence. As soon as Psi-Pi is powered on, it is able to listen to questions and respond with an answer provided from ChatGPT. You need a paid subscription to OpenAI. The Plus plan is sufficient.
Connection Table
| Component | Pin/Wire | Connection |
|---|---|---|
| MAX98357 Amp | VIN | Breadboard +5V |
| MAX98357 Amp | GND | Breadboard GND |
| MAX98357 Amp | DIN | Raspberry Pi GPIO 16 |
| MAX98357 Amp | BCLK | Raspberry Pi GPIO 20 |
| MAX98357 Amp | LRC | Raspberry Pi GPIO 21 |
| MAX98357 Amp | GAIN | Potentiometer Middle Pin |
| Potentiometer | VCC | Breadboard +5V |
| Potentiometer | GND | Breadboard GND |
| Speaker | + | AMP Speaker Output + |
| Speaker | − | AMP Speaker Output − |
| USB Microphone | USB | Raspberry Pi USB Port |
| Fans | + / − | Breadboard 5V / GND |
| Screen | GPIO Pins | First 26 Pins(direct mount) |
| Buck Converter | VOUT + / − | Breadboard +5V / GND |
| Buck Converter | VIN + / − | LiPo Battery + / − |
