Circuit Splash

Build an ESP32 speech recognition offline system with Edge Impulse. Create your own ESP32 voice assistant using an INMP441 microphone for hands-free control.

Build a smart ESP32 speaking alarm clock using XIAO ESP32-S3, Wit.ai TTS & MAX98357A. Announces time & custom messages aloud. Step-by-step wiring, code & web UI guide.

Build a Litewing ESP32 drone with a loudspeaker using Bluetooth Stream real-time announcements, voice alerts & audio from the air. No coding needed. Full wiring guide

Build ESP32-C3 text to speech using AI API and the WitAITTS Arduino library. Full wiring, code, and troubleshooting guide for natural voice output.

Learn how to build a wireless stepper motor controller using an ESP32-S3 and TMC2240 driver. This detailed tutorial guides you through wiring, custom PCB design, USB-C PD power management, closed-loop control with an AS5600 encoder, and a browser-based UI with real-time status and RGB feedback. Includes Gerbers, BOM, and full source code.

Complete ESP32 text to speech using AI guide. Learn ESP32 TTS library setup, circuit wiring, code examples for voice-enabled IoT projects with MAX98357A amplifier.

Build an offline voice recognition system using the low-cost SU-03T module. Full wiring, SDK setup & firmware flash guide. The SU-03T is the cheapest alternative to the VC-02 offline voice module

Build an ESP32 text to speech offline converter with Talkie TTS library. Step-by-step tutorial includes circuit connections, code examples, and troubleshooting.

Technical guide to interfacing ESP32 with thermal printers (PNP-500/RS203) over UART. Explains hardware wiring, power considerations, and implementation of ESC/POS commands for printing text, images, barcodes, and QR codes. Includes detailed circuit diagrams and Arduino code on GitHub.