• Pre-assembled and fully tested electronic modules
• Great for robotics or general project use 

A new operating mode (tying the mode pin to ground) allows the SRF05 to use a single pin for both trigger and echo, thereby saving valuable pins on your controller. When the mode pin is left unconnected, the SRF05 operates with separate trigger and echo pins, like the SRF04.  Range is increased from 3 meters to 4 meters.

Voltage - 5v only required
Current - 30mA Typ. 50mA Max.
Frequency - 40KHz
Range - 3cm - 3 m
Input Trigger - 10uS Min. TTL level pulse
Echo Pulse - Positive TTL level signal, width proportional to range.
Small Size - 43mm x 20mm x 17mm height

The SRF02 is a single transducer ultrasonic rangefinder in a small footprint PCB. It features both I2C and a Serial interfaces. The serial interface is a standard TTL level UART format at 9600 baud,1 start, 2 stop and no parity bits, and may be connected directly to the serial ports on any microcontroller. Up to 16 SRF02's may be connected together on a single bus, either I2C or Serial. New commands in the SRF02 include the ability to send an ultrasonic burst on its own without a reception cycle, and the ability to perform a reception cycle without the preceding burst.  The minimum measurement range is around 15cm (6 inches). Like all our rangefinders, the SRF02 can measure in uS, cm or inches.