The Smart Assistive Navigation System is an embedded IoT-based mini project developed using Arduino Nano, Arduino UNO, ESP32-CAM module, ultrasonic sensor, buzzer alert system and TTL programming ...
If your buzzer is active-HIGH, flip the code flag (see “Configuration”). If you discover your buzzer is 5V-only, power it at 5V and use a small NPN/MOSFET level driver for I/O (ask if you want a tiny ...
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