Using MatchBox cars as a switch


[atduskgreg] posted this interesting setup to flickr. He’s using two toy cars as a switch. He has wired into their metal undercarriages so when they collide, the circuit closes. We’ve seen some pretty nifty home made interface items, but usually they are posted with a clear purpose or a project. This one is a little puzzling. Does he intend to keep using the cars or was he just fooling around? Is he working on a toy that does something when they crash? Was he merely bored and wanted to see what he could attach to his Arduino. We may never know.

78 thoughts on “Using MatchBox cars as a switch

  1. For whatever its worth, this photo was documenting an early stage of a project that actually did have a practical application (however modest). I used the ability to detect the moment of impact between the cars to flash a bank of LEDs. That way, I could take a picture of the moment of impact between two rolling cars by leaving a camera in position with the shutter open. With the lights off, a short enough LED flash would act like a short exposure of just the collision. Check out the rest of the documentation photos and some of the results here: I’ve also written up the results of the process and what I learned here:

  2. Wait, so why is the arduino not centered in the picture. Like its impossible to see which wire goes where?

    This is a really good hack. 100% New stuff, now I don’t need to buy these really expensive switches.

  3. ArduinoFreak — The wires aren’t centered in the picture because the circuit is so damn simple that I thought people could mostly figure it out and it was worth sacrificing really clear documentation of that for a nicer picture. If you want a step-by-step walkthrough of using a switch to turn on an LED with an Arduino, checkout the tutorial from my class at ITP:

  4. Greg – The vitriol isn’t hard to understand; previously this was an awesome site. Now the person who brought us slothra and the arduino mousetrap managed to sink even lower – an accomplishment many didn’t think was possible.

    Not that anything you did was inherently wrong, but do you honestly think it was newsworthy? That using an arduino as yet another common simple device was an accomplishment needing coverage?

  5. i wish someone would post a hack about how to delete websites from a remote location,so i could put this miserable “hack” site out of it’s misery.

    no court would convict me,since it would be OBVIOUSLY be a mercy killing.

  6. why is everyone so pissy on this site now a days? I for one love these little posts, because it gives me ideas.

    attach two matchbox cars and use them for circuit bending. epic on stage performance. never would have thought of this with you hackaday.

    keep it up!

  7. if you replace the toy cars with two golden spike dildos and shove one in each of Caleb’s orifice, that should trigger a reaction of some kind..maybe upgrade to a voltage regulator and…and…what’s the use, nobody listens to me anymore…silly wabbit

  8. @Remarknl
    :”“All contents copyright © 2008, Hack A Day. All Rights Reserved.”

    I think this shows exactly how bad this site is managed…”

    I think so too.

    BTW: I think the site should enforce email confirmations again so idiotic noobs such a myself don’t flame… Or maybe we can all have accounts someday. (When pigs fly) I say we will never have an account system. Prove me wrong.

  9. definite big thumbs up for,it’s what this site should aspire to. also,lifehacker (while having a lot of silly crap) does also bust out some interesting stuff once in a while. you sure as shit do NOT see the ridiculous and repetitive product placement that you get beaten over the head with here at hackaday.

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