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by k12adminguy
Fri May 17, 2019 5:21 pm
Forum: Automation, sensing and robotics
Topic: Sprint Timer
Replies: 10
Views: 600

Re: Sprint Timer

If I use a photo resistor, to detect the beam break on the finish end, what is the best way to attach to the gpio. The distant would be at least 120 feet.

I would have a start laser and resistor and a finish laser and resistor.
by k12adminguy
Mon Apr 29, 2019 7:12 pm
Forum: Automation, sensing and robotics
Topic: Sprint Timer
Replies: 10
Views: 600

Sprint Timer

I am looking to build a timer for the 40yrd dash for my high school. What would be the best sensors to use for that and what do you think would be the best way to connect the two sensors.

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