Timeline for RC drag strip finish line with mph calculation (using 1" spaced lasers)
Current License: CC BY-SA 3.0
13 events
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| Apr 13, 2017 at 12:50 | history | edited | Community Bot |
replaced http://arduino.stackexchange.com/ with https://arduino.stackexchange.com/
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| Feb 4, 2016 at 5:21 | comment | added | Nick Gammon♦ |
I chose the slower speed because my kids just did a pinewood derby race - so, not quite 100mph?
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| Feb 4, 2016 at 5:16 | comment | added | Dave X | I made more edits and it seems to compile for an Uno. To test it on the AT90usb1286 hardware I've got, I'd need to switch things over to port B. | |
| Feb 4, 2016 at 5:11 | history | edited | Dave X | CC BY-SA 3.0 |
fix code to compile
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| Feb 4, 2016 at 5:03 | history | edited | Dave X | CC BY-SA 3.0 |
fix code to compile
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| Feb 4, 2016 at 4:52 | comment | added | Dave X | Yes, catching all entries was what I was aiming at. Thanks for the tips. | |
| Feb 4, 2016 at 4:49 | history | edited | Dave X | CC BY-SA 3.0 |
+volatile and 16 bit shift
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| Feb 4, 2016 at 4:39 | comment | added | Nick Gammon♦ |
Are you trying to catch all entries? In that case 4s might be too little. You could catch overflows ... wait you just edited that in. Excellent. Tip: make t1Cycles volatile. Also I think you want to shift t1Cycles left 16, as Timer 1 is a 16-bit timer.
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| Feb 4, 2016 at 3:46 | history | edited | Dave X | CC BY-SA 3.0 |
Add suggestion on longer cycles by cascading into a varaible.
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| Feb 4, 2016 at 2:58 | history | edited | Dave X | CC BY-SA 3.0 |
Add comments for faster clocking.
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| Feb 4, 2016 at 2:44 | comment | added | Dave X | One certainly could use a lower prescaler. I chose the slower speed because my kids just did a pinewood derby race, and wanted to allow plenty of time to measure the slow cars to cross the line. | |
| Feb 3, 2016 at 21:53 | comment | added | Nick Gammon♦ | I think I would use a much lower prescaler. Since you have kept the timer stopped until the first pulse, it won't take 4 seconds for the car to cross to the second laser. | |
| Feb 3, 2016 at 19:34 | history | answered | Dave X | CC BY-SA 3.0 |