Speed Sensor- suggestions

[Neyolight]

Heya Everyone

I need to measure speed of my toy car in an experiment I just set up . Any suggestion as to what I can uses? Something simple , accurate and with PC interface?

The lower the price the better!

Thanks

 

[kak111]

Measure the time spent by a car between two light barrier.

 

[Neyolight]

Measure the time spent by a car between two light barrier.

Yup can do that. Infact that was my initial thought too!

---------- Post added at 12:36 ---------- Previous post was at 12:30 ----------

But something simple and something that doesn't require much coding would be better!

 

[karthikkrv85]

If the toy car wheel has holes, you can install a IR transceiver and monitor the no of pulses per sec to calculate the speed of wheel rotation (intern car speed). I hope it doesn't cost much as well as less code.

Regards,
karthikkr

 

[kak111]

I think this is the one of the simplest way.

N pieces of light barriers
if only one barrier is used, system gives lap times

Every time PC get pulse input, real time is stored.
Pc calculates time between pulses and
when distance between barriers are known , speed is calculated too.
Print time number , time and speed
loop this until stop



You can do recalculation with selected time number,
to get separate lists for part times , speeds and lap times.
etc...etc..