The SRF04 Ultra Sonic Ranger Module is a high quality ultra sonic range finder, which can easily be connected to many microcontroller's to measure/detect the presence of obstacles.

Using a 5V supply and drawing from 30mA typical. to 50mA max. The SRF04 can be connected directly to many micros without the need for a separate power supply.

For connection details and programming examples click on the appropriate link below:

• OOPic
• BasicX-24
• Basic Atom
• Brainstem

Specification

• Voltage - 5v only required
• Current - 30mA Typical. 50mA Max.
• Frequency - 40KHz
• Max Range - 3 m
• Min Range - 3 cm
• Sensitivity - Detect 3cm diameter broom handle at > 2 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

Downloads
SRF04 Pinout Datasheet (.pdf 220 Kb)
SRF04 Sonar Schematic Datasheet (.pdf 162 Kb)
SRF04 Timing Diagram Datasheet (.pdf 11 Kb)