How To Build an Electronic Finish Line

Diecast64 Monday, 1/13/2020

Hey guys I’ve been working on a how-to for making an electronic finish line for a while.  I finally finished it.  There is an extensive post with pictures and links you can find here: www.racehotwheels.com/2020/01/diy-hot-wheels-finish-gate-build-your.html

 It is based on the finish line that I use on my shelf track.  I wrote it so that if you have zero electronics background you should still be able to build it.  I also wrote it so that if you have limited resources and building skills, you should still be able to build it.  If your skills or resources are more advanced, take the basic idea and get creative.  I also made a video. The post is way more detailed, but here is the main idea.

youtu.be/dQwr9i6L2Eg

 Hopefully this will be helpful for some of you.  Let me know if anything is unclear in the article so I can fix it and make it more understandable. 


Discussion

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Go_Time 1/13/20

This is awesome!!! Thank you for the article. 

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redlinederby 1/13/20
Site manager

Wow...great work! Nice full featured tutorial. This might get me to dig out my Arduino from when I tried to make a finish line years ago. I used PVC pipe as the structure and my prototype worked well but the thing was HUGE with the project box and everything. 

I'd love to have something that I could build an API for and connect to the web site. That's my dream. Wish I had enough knowledge and backbone to figure out how to connect Arduino or RPi to the 3DBM finish line I have, rather than build a whole new finish line.

Thanks for the share!

  • The 3DBM finish line is based on an Arduino so all the resistors would be the correct voltage. — 3DBotMaker
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Mattman213 1/13/20

I just finished up something very similar but used photoresistors to sense the car crossing and trigger the win light.  Used a broked 60's finish line to put all the lights and sensors and its been fantastic (once I finally got it all to work properly).  I followed an article that 3D Botmaker posted here a long time ago.  Love seeing this kinda stuff!

Matt

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redlinederby 1/13/20
Site manager

I don't think I would have thought to use the sensors with the paddles on top rather than having the car break the sensor. Interesting. It's a nice way to get the guts out of the bottom, everything is on top. 

  • Not only does it get the guts off the bottom, but you don't have any issues with sensitivity from background or outside light when it's enclosed at the top. — Diecast64
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