SRF04 - Parallax

SRF04 Ultrasonic Range Finger Application Note

]--------------------------------------------' ' This program uses the Devantech SRF04 to measure the distance between the ' unit and a target. Display is raw value, centimeters, and inches. ' -----[ Revision History ]-----------------------------------------------' ' 01 OCT 2003 : Updated for PBASIC 2.5 and for any BASIC Stamp module ' -----[ I/O Definition.

Features

w w w .D at aS he et 1 For a Javelin Stamp application note see www.javelinstamp.com. 4U Parallax, Inc.
• Devantech SRF04 Ultrasonic Range Finder (#28015)
• 10/2003 .c om Page 1 www.DataSheet4U.com
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• Voltage
  – 5 v Current
  – 30 mA Typ. 50mA Max. Frequency
  – 40 kHz Max Range - 3 m Min Range - 3 cm Sensitivity - Detect 3 cm diameter broom handle at > 2 m Input Trigger
  – 10 uS Min. TTL level pulse Echo Pulse - Positive TTL level signal, width proportional to range. Small Size
  – (1.7 in x .8 in x .7 in height) 43 mm x 20 mm x 17 mm height Connection to the BASIC S.