Ultrasonic Ranger SRF04

SRF04 is a great ranger for basic usage.

• Range - 3cm to 3m
• Power - 5v, 30mA Typ.
• Frequency - 40KHz.
• Size - 43mm x 20mm x 17mm height.

The input Trigger is a 10uS Min. TTL level pulse. Echo Pulse is Positive TTL level signal, with the width proportional to the object range.