$4.50 each
The HC-SR04 Ultrasonic Sensor is an affordable proximity/distance sensor that can be used for object avoidance in various applications from robotics to car parking. The module has integral ultrasonic transmitters, receiver and control circuit and is for use in conjunction with Arduino boards.

Working Voltage: DC 5V
Output : 5V
Static Current: 2mA
Detection Distance : 20 ∼ 4500mm
Resolution: >2mm
Dimensions : 45 x 27 x 17mm
Weight : 9g
Spec sheet available in PDF format.
Average Customer Review:  (1 Review) Write A Review

Customer Comments

Average Customer Review:  (1 Review) Write A Review

A customer from BURLINGTON, WA USA
Satisfactory - with added resistor on Echo
Bought two of these. Both test satisfactory. Added 10k SMT 0603 resistor to echo trace between transmitter and receiver units to assure output current is limited to no more than 500uA @ 5V for use with 3.3V Parallax Propeller IO pins.