Ultrasonic HC-SR04 Distance Sensor Module

Specifications

• 4 pins
  
• Power supply: 5V DC
  
• Static current: 2mA
  
• Sensor angle: 15 to 35 degrees
  
• Sensing distance: 0.75in (2cm) to 13ft (4m)
  
  • More precise measurements with ranges up to 6.5ft (2m) away
    
• Precision: up to 0.12in (0.3cm)

Resources

• HC-SR04 Arduino Library and example sketches (Arduino Playground)
  
• Simple Arduino and HC-SR04 Example (Instructables)
  
• HC-SR04 Energia Example (from Frank Milburn)