This is an instructable for building a quirky sonar range finder.
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Step 1: Build Sonar Range Finder
Step 2: Code the Range Finder
Create code for use in the range finder.
Step 3: Run Diagnostic
Verify the code and fix all errors which occur.
Make sure the ports are connected to the right connectors.
Step 4: Record Values
Run the program.
Point the sonar at a surface.
Record values when the sonar is 2, 4, 6, 8, 10, and 12 inches away from the surface.