On the way to an instructables.com tute! first run with the custom pcb.
Tag / Ultrasonic Sensor
Ultrasonic Sensor Info
Ultrasonic Sensore code for the HC-SR04 (4 pins – 5v, GND, Trig, Echo): Website, Library Download,
Ping Sensor from Parallax (3 pins – 5v, GND, Signal): Sensor, Datasheet, Library v1.3, Link01, Arduino Library Link, Arduino.cc Tutorial
Project HALO: Source Code & Library, Website
Imran Shamsul 