Ultrasonic Range Sensor

Price (USD) [ $35.95 ]
Model Number [ URS-01 ]
Ship Weight [ 0.05 lbs. ]

This is the Devantec SRF-04. The tiny package easily mounts to your small robot. It is assembled using surface mount technology. Requires soldering wires to the module.

Accessories

Multi-Purpose Sensor Housing Kit (MPSH-01)
Ultrasonic Range Sensor Cable - 8" (URSC-01)

Images / Videos

640 x 480 image of cable connected to sensor
640 x 480 image Sensor Front View
640 x 480 image Sensor Back View
640 x 480 image Sensor and housing
640 x 480 image On servo (front)
640 x 480 image On servo (back)
640 x 480 image Timing
640 x 480 image Beam Pattern
640 x 480 image Wiring Diagram
640 x 480 image Two sensors with BS2

Specifications

Sensor type = Reflective Ultrasonic
Frequency = 40KHz
Ultrasonic sender = N1076
Ultrasonic receiver = N1081
I/O required = Two digital lines, 1 output, 1 input
Minimum range = Approximately 3cm
Maximum range = Approximately 3m
Sensitivity = Detects a 3cm diameter stick at > 2m
Input trigger = 10uS Min. TTL level pulse
Echo Pulse = Positive TTL level signal, width proportional to range
Input voltage = 5vdc regulated
Current requirements = 30mA Typ 50mA Max
PC board size = ~.75" x 1.75"

Information

This high performance ultrasonic range finder is compact and measures an amazingly wide range from 3cm to 3m. This ranger is perfect for your robot, or any other projects requiring accurate ranging information.

The URS is a straight-forward ultrasonic range sensor. The host microcontroller provides a positive going pulse on the INIT pin on the sonar module to begin a reading. After the INIT input pin goes low, the sonar module emits a ping. After the ping, the ECHO output goes high. It returns low again when the module receives an echo. Check out a BS2 example program here. Note, due to a timing bug with the BASIC Stamp 2, you must use pin0 to measure the echo pulse!