an ultrasonic sensor used as a car sensor

Dependencies:   N5110 PowerControl beep mbed sensor

Revision:
0:be8f580f1b5b
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Thu Apr 30 10:34:39 2015 +0000
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+http://mbed.org/users/mbed_official/code/mbed/builds/433970e64889
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