An IR LED was the original posted question, but the question applies to any LED I guess that is blinking faster than the eye can detect. I can see using a photo transistor and a scope, but in this case the original poster did not have a scope.
I have seen frequency counters that had a pulse width measurement function, but the price of such things is right up there with a scope.
So do you make your own pulse width counter? We are looking at sub-microseconds for a pulse width. So we need a 4 digit counter that counts in nanoseconds? Not with any parts I have in stock.
Any other ideas?
I have seen frequency counters that had a pulse width measurement function, but the price of such things is right up there with a scope.
So do you make your own pulse width counter? We are looking at sub-microseconds for a pulse width. So we need a 4 digit counter that counts in nanoseconds? Not with any parts I have in stock.
Any other ideas?