Arduino based co2 dragster car timer

RE: Arduino based co2 dragster car timer

e14 Contributor — Wed, 29 May 2013 06:09:33 GMT

hi marks,

surely missed the point, it is object detection (IR Beam) with LDR....

maybe a photo diode/photo transistor replacement would be an alternative..

cheers

sid

mcb1 — Wed, 29 May 2013 05:49:03 GMT

I think you've missed the point.

They want to detect the car breaking a beam, and the LDR wasn't fast enough.

Not sure how this fits that

You can use and train your devices/car to read specific IR Codes to do control actions. Suggest you have a look at Ken Schrifft IR Library.

Mark

e14 Contributor — Wed, 29 May 2013 05:21:29 GMT

use simple easily available IR modulator detector TSOP1738. This is universally used in most devices to receive IR codes from remotes.

You can use and train your devices/car to read specific IR Codes to do control actions. Suggest you have a look at Ken Schrifft IR Library.

Fairly easy to use the IR Library with TSOP1738 sensor

Cheers

sid

ntewinkel — Tue, 28 May 2013 02:13:38 GMT

I think folks use infrared beam breaking for that kind of thing.

Searching Google for "arduino infrared beam-break sensor" nets a fair number of examples.

Otherwise maybe scavenging a set from an old garage door might work?

Cheers,

-Nico

mcb1 — Tue, 28 May 2013 02:11:27 GMT

Carl

I'd be trying an IR beam, and detector.

They usually modulate the IR signal with 38Khz to avoid the ambient IR issues.

Essentially you'd be looking for a constant 38Khz, so as soon as its gone its broken.

You can place the sender and receiver in tubes, to cut done on the refection to improve accuracy.

A quick check on Google gave 82,000 hits, but the first two are

Terry King has a very good one with some easy to mount units.

mark