Devantech SRF04 Ultrasonic Range Finder		$30.00
Click for larger image	Uses sonar to detect obstacles. Has a much wider field-of-view than the Sharp infrared distance measuring sensors. Interfaces easily with the Mark III or your own robot design. Comes completely assembled - this is not a kit. This product is made by Devantech. More information, applications, and code samples may be found on their web site.	In Stock
Datasheets SRF04 Sonar Schematic SRF04 Timing Diagram SRF04 Pinouts Voltage: 5V only Required Current: 30 mA Typical, 50 mA Max. Frequency: 40 KHz Maximum Range: 3 meters (~10 ft.) Minimum Range: 3 cm (~1") Sensitivity: Detect 3 cm dia. broom handle at > 2 m Input Trigger: 10 uSec min. TTL level pulse Echo Pulse: Positive TTL level signal, width proportional to range Size: 1.69 x 0.79 x 0.67 in. 43 x 20 x 17 mm