MAKING FROM ZERO
I am Qihao. I started without a manufacturing background and am learning, with help from AI, how to make physical things. I document the trials, failures, and improvements that turn each idea into something real.
CURRENT CHAPTER
The site grows with the real work. This section always keeps the latest public experiment, problem, or milestone.
The local voice platform originally called TTS again whenever the same text was sent, creating a duplicate MP3. Starting with that real duplicate-file problem, this article explains why audio assets and playback jobs should be separate, and how cache keys, history playback, resending, and legacy database migration fit together.
Read this updateLATEST BUILDS
Each project starts as an idea and records how testing, revision, and assembly turn it into a physical object.
Building a button-triggered AI voice conversation prototype that records the user's voice, sends it to a server for language-model processing, and plays the spoken response through the device's speaker.
THE PROCESS OUTLASTS THE ANSWER
Power, structure, materials, and even how a problem is described can stop an idea. Writing the problem clearly keeps the next attempt from repeating it.
The local voice platform originally called TTS again whenever the same text was sent, creating a duplicate MP3. Starting with that real duplicate-file problem, this article explains why audio assets and playback jobs should be separate, and how cache keys, history playback, resending, and legacy database migration fit together.
Read articleI moved the ESP32-S3 from playing audio embedded in firmware to speaking text entered dynamically in a browser. This article documents the working path from the web UI through local TTS and a task queue to the ESP32, MAX98357A, and speaker—and clearly marks the voice-input work that remains.
Read articleA hands-on ESP32-S3 voice playback build: adapt a two-pin speaker connector to the MAX98357A screw terminal, complete the five-wire I²S connection, and verify the audio output with three test tones and five web-generated voice clips.
Read articleSTART AT THE BEGINNING
This archive follows each build from the first attempt through failure, rework, and a working result. Start with the earliest public note.
