Build a WiFi-based SMS alert system using Seeed Studio XIAO ESP32 and HC-SR04 sensor. Send real-time notifications via free API—no GSM module needed. Complete tutorial with code.
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Category: Microcontrollers Tags:
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Interfacing Raspberry Pi Pico RTC DS3231 : Easy Setup Guide & Code
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Learn to interface the Raspberry Pi Pico RTC DS3231 using Arduino IDE. Build an accurate digital clock with 16x2 I²C LCD. Includes circuit diagram, code & troubleshooting.
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Smart Energy Meter Using IoT with MQTT Dashboard & Alerts
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Build an IoT-based smart energy meter using ESP32 & PZEM-004T. Real-time monitoring via the MQTT dashboard, SMS alerts for abnormal conditions. Complete circuit & code included.
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LED Chaser Circuit using 555 Timer IC: Step by Step Guide 2025
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Build an LED chaser circuit using a 555 timer IC and a CD4017. Complete guide with circuit diagram, pinout, assembly steps, and troubleshooting. Adjustable speed control included.
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Automatic Toll Gate System Using Arduino
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Build an automatic toll gate system project using Arduino with RFID, IR sensors & servo motor. Complete circuit diagram, code & step-by-step tutorial for beginners.
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Build Your Own ESP32 AI Voice Assistant with MCP Integration
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Build an intelligent ESP32 AI voice assistant using Xiaozhi framework. Includes PCB design, hardware assembly, 3D enclosure, and MCP integration for smart home control.
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Build GPS Tracker with XIAO ESP32-S3: Geofence & SMS Alerts
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Create a Wi-Fi GPS tracker using Seeed Studio XIAO ESP32-S3 & Neo-6M module. Features geofencing, SMS alerts, offline storage. No SIM card needed. Free GeoLinker tracking!
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STM32 Precision Digital Micro Current Meter - Complete Build
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Complete guide to building a precision digital micro ampere meter using STM32. Measures nA to mA with OLED display. Includes circuit, PCB files, firmware & 3D enclosure. DIY ampere meter DC digital.
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Interfacing SD Card Module with Raspberry Pi Pico Guide
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Learn to interface SD card module with Raspberry Pi Pico using SPI. Complete wiring guide, Arduino code, FAT32 setup, file operations & troubleshooting included.
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Dual Axis Solar Tracker System Using Arduino
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Build a dual axis solar tracker system using Arduino, LDR sensors & servo motors. Increase solar panel efficiency by 30-40%. Complete circuit diagram & code included.
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