Dual ultrasonic sensor

1.Instructions

The HC-SR04  is an inexpensive ultrasonic sensor that can sense not only if an object presents itself, like a PIR sensor, but can also sense and relay the distance to that object.

 Features:

·         Power Supply :+5V DC

·         Quiescent Current : <2mA

·         Working Currnt: 15mA

·         Effectual Angle: <15°

·         Ranging Distance : 2cm – 400 cm/1" - 13ft

·         Resolution : 0.3 cm

·         Measuring Angle: 30 degree

·         Trigger Input Pulse width: 10uS

2. Pin Instruction