i will be having 2 targets of equal width.The targets being either concave mirrors or aluminium foils with black insulation tapes pasted on it.I need to count the no. of pulses obtained from the target.I will use different no. of pulses for both the targets.So there are 2 ways of determining my target.One is by finding the pulse width and the other by counting the no. of pulses.I want to know how 2 set the timer for calculating the width of the pulse or setting the counter for calculating the no. of pulses.I request you to give me the logic for doing the above program.Sample codes could help me further