I am an Industrial design student working on my final 4th year project.
I am looking for a range sensor to detect vehicles approaching from a 100 meters.
The sensor will be integrated into a product that fits on a bicycle handle bar.
So need to be compact and run on low voltage. The intention is to use a small recharge lithium 5v battery.
I am not an electronics expert, but will try programming the functions using Arduino and snippets of code from
various sources. The sensor will trigger a light at three stages of the vehicles distance from the bike.
Any thoughts on a sensor that could work?