i am doing a project on traffic automisation. the concept i want to use is to give time delays for LEDs based
on the traffic density.
I am new to arduino.
so pls help me with this.
which arduino model should i buy??
how many LEDs can i control individually with arduino based on input from an external sensor??
I always suggest starting off with the basic Uno board. It has a total of 19 I/O pins available, but there are easy ways to expand to more input and output pins using simple external components. If you know for sure you are going to need more I/O pins then the Uno has then the mega board has many more built in.