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101 display basics
Racing Lights for athletics running track, 40-50m. What are the correct questions to ask?
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[QUOTE="Mark_M, post: 120615, member: 29098"] Idea #2. Thinking outside of lights. Could it be something mechanical...? I'm thinking a closed loop pulley with a flag. [ATTACH type="full" width="726px"]17956[/ATTACH] Either end has a pulley and paracord in a loop between. A flag attached as marker. A flag would be used so no end stop switch is needed, the flag would just go around the pulley. Each end can have a hole big enough for the pulley's spike to sit in. This would give a perfect 50m and insure the loop is tight. Ideally in concrete so it will not move over time. [ATTACH type="full" width="582px"]17957[/ATTACH] One of the pulley's would have a motor inside. We know the distance; so calculating the revolutions per minute with the radius of the pulley, into meter per second of the loop would be easy. A simple Arduino sketch (code) with a screen and a knob. I would use the knob to set the time taken. Background task would assume 50m distance. Arduino can easily calculate all the stuff in the background for how fast the motor spins. [ATTACH type="full" width="584px"]17958[/ATTACH] This also means it could be battery powered? LED strip takes a lot of power. It also saves having to run power constantly beside it, as only one end needs power. The system would also have a natural speed ramp instead of instant speed. [/QUOTE]
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Racing Lights for athletics running track, 40-50m. What are the correct questions to ask?
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