by Craigr1 » Fri Dec 04, 2009 5:35 am
I am sorry if these questions have been asked in previous posts, but I could not find them in the forum. I am looking to build a “speed trap” timer. This is a timer that will start when the first external trigger is tripped and stop when the second external trigger is tripped. The triggers are two photocells in parallel, simple enough. Here are my questions. Is there a way to have a third external trigger to act as a timer reset (start, stop then zero)? The application that I wish to use the timer for is curling, and when the player delivers the stone this will trip the first photocell and start the timer, the problem is that the player will trip the first trigger a second time with their body. This should stop the timer but this is not the desired result as the goal is to time the time of the stone between the two traps. Can the input be temporally disabled to allow for the second object breaking the first trigger and just time the curling stone? Thank you for your help.
I am sorry if these questions have been asked in previous posts, but I could not find them in the forum. I am looking to build a “speed trap” timer. This is a timer that will start when the first external trigger is tripped and stop when the second external trigger is tripped. The triggers are two photocells in parallel, simple enough. Here are my questions. Is there a way to have a third external trigger to act as a timer reset (start, stop then zero)? The application that I wish to use the timer for is curling, and when the player delivers the stone this will trip the first photocell and start the timer, the problem is that the player will trip the first trigger a second time with their body. This should stop the timer but this is not the desired result as the goal is to time the time of the stone between the two traps. Can the input be temporally disabled to allow for the second object breaking the first trigger and just time the curling stone? Thank you for your help.