Time measurement between two signals using microcontroller

Thread Starter

indiansiva555@gmail.com

Joined Jul 24, 2011
13
Please help....
How to measure time between two signals using microcontroller. Here I am using a laser pulse. The time is to be measured between transmitted laser signal and its reception (after reflection)
 

crutschow

Joined Mar 14, 2008
25,441
That is not a trivial measurement due to the short time of flight. It requires a high speed comparator and digital counter. Read this for more info.
 

Thread Starter

indiansiva555@gmail.com

Joined Jul 24, 2011
13
Thank you Senior.
Your link provided me useful information about the working principle of laser range finders. But I am unaware of the comparators to be used and I am a beginner. So please help me in choosing the comparator.
 

nsaspook

Joined Aug 27, 2009
7,594

Thread Starter

indiansiva555@gmail.com

Joined Jul 24, 2011
13
I want this to be installed in my car, so that I would be able measure the distance between my car and the one in the front. I also wan this to work as a proximity to sense a vehicle entering into my lane at a range of 30m. I don't want to make it very accurate. I am doing this to get an idea of such systems as I am a student.
 
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