This is an Arduino-based Proximity Sensor circuit wired using the popular HC-SR04 Ultrasonic ranging module ... and best understood by referring the wiring diagram. If everything goes right,you should ...

So you finally decided to hop on the Arduino bandwagon and start making electronic projects as a fun hobby ... capacitor), input (e.g., push button, ultrasonic sensor, keypad), output (e.g ...

Inside [Klaus]’ device is an Arduino Uno, an HC-SR04 ultrasonic distance sensor, and an Adafruit Wave Shield. Originally, this parking/distance sensor used a small TFT to display the distance to ...