Graham Howard Posted September 15, 2012 Share Posted September 15, 2012 Some of you in class 2 have noticed a little box of electronics sitting above the dash on my car this season. It's not data logging but it has helped to analyse my times beyond the data provided by the official timing. I thought I would share with you all what this does here. I have plans to produce a mark 2 version for next year based on what I have learnt. Graham Link to comment Share on other sites More sharing options...
robmar Posted September 17, 2012 Share Posted September 17, 2012 Graham - that is really smart Link to comment Share on other sites More sharing options...
Support Team rob spencer Posted September 17, 2012 Support Team Share Posted September 17, 2012 It's a really neat device Graham. You don't get all the bells and whistles of a commercial data logger but you get the most important bits of info. It certainly seems to have done a good job for you this season 😶🌫️ Link to comment Share on other sites More sharing options...
Z3MCJez Posted September 20, 2012 Share Posted September 20, 2012 This is very impressive stuff. Next a GPS? On my dataloggers, I use real-time deltas all the time on one. I think you could make something quite straightforward which plots total number of wheel revolutions against time and then compares this to previous runs. The assumption being more wheel revolutions is good. That may not always hold, if lines are wide etc, but could be a good indicator. You could also have half-a-dozen LEDs - 3 red and 3 green - Then you could have some graduated indication as to how far ahead or behind you are? Jez Link to comment Share on other sites More sharing options...
Alan Bowler Posted September 20, 2012 Share Posted September 20, 2012 Don't encourage him, he's fast enough already I'm very impressed with it. Having 4x split times is very useful. Not sure how I'd react to a red or green light saying I was on a slower or faster lap though. When you go into production with these, put my name down for one! (Happy to tinker with C++ but not so good with lectronics) Link to comment Share on other sites More sharing options...
Mark Durrant Posted September 20, 2012 Share Posted September 20, 2012 Alan If you build one I suggest you do not waste your money on a green LED 😬 Link to comment Share on other sites More sharing options...
The Headmaster Posted September 20, 2012 Share Posted September 20, 2012 😳 Link to comment Share on other sites More sharing options...
Alan Bowler Posted September 20, 2012 Share Posted September 20, 2012 Abusive posting reported. 😬 Link to comment Share on other sites More sharing options...
Graham Howard Posted September 20, 2012 Author Share Posted September 20, 2012 Thanks all for your words of encouragement. To be honest I surprised myself at how easy it was to make this work. I have done a bit of programming before and the electronics is nothing complicated. In the spirit of open source I hope to get around to publishing instructions on how it was made. Jez, the idea of a number of lights to get graduated time is great and I will definitely look at that. To store the time at each wheel revolution would require more memory. I think that is possible. I am considering adding an SD card to record the time for each wheel rev in a csv file and load it into excel for plotting. I could then overlay each run like a proper data logger and derive speed. I am also going to have a small box with just the LED's for mounting near the shift lights and have the main unit with the display somewhere under the dash. And Alan I would be willing to make a special with just red lights to make sure you don't go any faster next year Graham Link to comment Share on other sites More sharing options...
Graham Howard Posted September 20, 2012 Author Share Posted September 20, 2012 Here is a basic description of how the box was constructed and its programming: here Link to comment Share on other sites More sharing options...
Englishmaninwales Posted September 20, 2012 Share Posted September 20, 2012 Graham Very impressive and clearly very effective. ( I'd be getting too many red lights 😳 ) Link to comment Share on other sites More sharing options...
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