The Ultrasonic Ranging Module provides stable readings and accurately measures distance. This module can be used for a number of projects such as fluid level in a tank, distance to obstacles, and other sensing tasks.

KEY FEATURES 

• Working voltage : 5V(DC)
• Static current: Less than 2mA.
• Output signal: Electric frequency signal, high level 5V, low level 0V.
• Sensor angle: Not more than 15 degrees.
• Detection distance: 2cm~450cm.
• High precision: Up to 3mm
• Mode of connection: VCC / trig(T) / echo(R) / GND

NOTES 

• Initiate IO trigger by supplying at least 10us high signal
• The module automatically sends eight 40khz square waves and detects the returning pulse signal if available
• Unlike in the photos, a 25 cent coin is not included

LINKS

• Download - http://www.ic5188.com/PDF/HC-SR04.rar
• Interrupt-driven C code for ODROID-C0/C1/C1+ with Python example - https://github.com/OtherCrashOverride/hc-sr04
• ODROID Forum post discussing this module - http://forum.odroid.com/viewtopic.php?f=55&t=18793&sid=18a943e0a9f67e4459dea756cdaf8109#p125

Warranty is valid for two weeks, starting upon date of receipt.