Vehicle Counter
Sunday, April 04, 2021
We live near a highway that is well travelled by tourists in the summer, so I wanted to get a count of how many there were, so I built this vehicle counter.  It is NOT complete because I'm still struggling with the sensor to use.  Laser is best but requires a reflector across the highway.  It's best because it is On-Off.  My LIDAR sensors didn't have the range, and the ultrasonic (shown below) is "noisy", i.e. NOT On-Off, so filtering and multi-sampling must be done.

This project is incomplete, 90% done
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Laser receiver
Arduino UNO for development purposes
Here I'm using an Arduino Nano for final build
Ultrasonic sensor.  Expensive but gives me range required.