gokart lap counter system

I want to record for Gokat race time.Should an infrared receiver be used? Is there a suitable product? And can you send and receive AMB transponder that is on the market with a regular IR receiver?

Is there any other way?

I am not good at English so I used a translator. Understand the mistranslation.

if you can put a line of site 'trip wire' at the finish line
and then have each cart with a transponder.
you could know the exact instant a cart crossed
and then with the transponder, know which cart it was.

Many tracks in the US have IR beacons at the start finish line. There are articles on making your own receiver like this page that I found with a Google search for "aim ir beacon receiver diy". You can also buid your own IR beacon (IR transmitter).

Edit: fixed link

dave-in-nj:
if you can put a line of site 'trip wire' at the finish line
and then have each cart with a transponder.
you could know the exact instant a cart crossed
and then with the transponder, know which cart it was.

what is trip wire???
Is there an url address where I can get information about it?
All I've searched for is the story of the trap.

groundFungus:
Many tracks in the US have IR beacons at the start finish line. There are articles on making your own receiver like this page that I found with a Google search for "aim ir beacon receiver diy". You can also buid your own IR beacon (IR transmitter).

The url address you gave me doesn't come up with anything

@tellme12

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ballscrewbob:
@tellme12

"REPORT TO MODERATOR" is NOT a "reply" button LOL

You should READ THIS to get the best out of the forum.

Bob.

I didn't know. I'm sorry.

The url address you gave me doesn't come up with anything

I fixed the link. Try it now.

groundFungus:
I fixed the link. Try it now.

Thank you very much! I think it's going to help a lot of help.

Is there any way to detect when passing through the finish line with a color sensor? Or is there a way to detect it with an IR sensor?

There are many ways to detect the passing. Among them, you can use the ultrasonic sensor. With the distance sensor, the distance measured by the ultrasonic sensor is changed when there is something passed though

An ultrasonic sensor might not be suitable. It depends on the distance that needs to be measured how often one can check.

Although I have no experience with it, I think that IR will work better from that perspective.

@tellme12

TOPIC MERGED.

Currently on a 7 day holiday for repeated cross posting.

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Bob.

Bob.

Maybe the kart should have the sensor and a wifi sender.

The sensor would have a view only to one side of the track or maybe above at the finish line. When the kart senses it has crossed finish it wifi sends ID to a track main board that adds time to kart number. If there is a scoreboard or lights the track board runs that.

Sometimes you can turn things around and they work. Easier to detect one finish line than tell karts apart.

It is possible to lay a wire and then send a signal on that wire. this is how we trace metal pipes under ground.
the cart could have a front sensor and send a signal when it passes.

it seems that there would be problems with this approach, securing the wire, having a car detect only over the wire…

but having the sensor on the car does seem to handle the car identification problem