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Offered by Autodesk, Tinkercad is a free online platform you can use to build and test out your Arduino circuits ... button, ultrasonic sensor, keypad), output (e.g., LED, DC motor, LCD), power ...
This is an Arduino-based Proximity Sensor circuit wired using the popular HC-SR04 Ultrasonic ranging module,used here for non-contact object detection purpose. The HC-SR04 module includes ultrasonic ...