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Author Topic: Sharp IR Rangefinder  (Read 1346 times)

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Offline AndyspinsTopic starter

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Sharp IR Rangefinder
« on: August 30, 2010, 08:29:17 AM »
can someone please link me to where I can buy A sharp IR rangefinder that senses color?

Offline madsci1016

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Re: Sharp IR Rangefinder
« Reply #1 on: August 30, 2010, 08:35:26 AM »
sharp IR rangefinder that senses color?

Are you trying to sense range, or color? Can't do both; at least without expensive 3D camera tracking.

Offline AndyspinsTopic starter

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Re: Sharp IR Rangefinder
« Reply #2 on: August 30, 2010, 09:50:10 AM »
sharp IR rangefinder that senses color?

Are you trying to sense range, or color? Can't do both; at least without expensive 3D camera tracking.
Oh, what does the range senseing do, I didn't know it was someting special.

Offline madsci1016

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Re: Sharp IR Rangefinder
« Reply #3 on: August 30, 2010, 09:53:46 AM »
You can get a sensor that will tell you how far away something is, or you can get one that tells' you what color it is.

range sensing tells you how far away something is. That's what a Sharp IR does.

Something like this tells you what color something is.

If you are just looking to sense contrast (light or dark) you can look at the sensors line following robots use to follow lines.

Offline AndyspinsTopic starter

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Re: Sharp IR Rangefinder
« Reply #4 on: August 30, 2010, 01:04:02 PM »
You can get a sensor that will tell you how far away something is, or you can get one that tells' you what color it is.

range sensing tells you how far away something is. That's what a Sharp IR does.

Something like this tells you what color something is.

If you are just looking to sense contrast (light or dark) you can look at the sensors line following robots use to follow lines.
Thanks! Is there anything that has to be attached to it to allow it to sense colors?

Offline madsci1016

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Re: Sharp IR Rangefinder
« Reply #5 on: August 30, 2010, 01:42:47 PM »
Which are you asking about?

There's nothing you can attach to a Sharp IR to sense colors. Like I said they only tell you how far away something is.

The sensor from sparkfun has everything it needs to sense color I believe. But it doesn't sense distance at all; and only works for things very close to it.

Offline AndyspinsTopic starter

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Re: Sharp IR Rangefinder
« Reply #6 on: August 30, 2010, 02:35:14 PM »
Which are you asking about?

There's nothing you can attach to a Sharp IR to sense colors. Like I said they only tell you how far away something is.

The sensor from sparkfun has everything it needs to sense color I believe. But it doesn't sense distance at all; and only works for things very close to it.
I was talking about the color sensor, so thanks that works!

Offline AndyspinsTopic starter

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Re: Sharp IR Rangefinder
« Reply #7 on: August 30, 2010, 02:55:34 PM »
The link given shows a board for a color sensor, I found a color sensor at http://www.sparkfun.com/commerce/product_info.php?products_id=8618 Can anyone tell me if I need the board to use it?

Offline ballbreaker

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Re: Sharp IR Rangefinder
« Reply #8 on: August 30, 2010, 03:01:11 PM »
you can use just a photoresistor to find color there's an excellent tutorial on sor about that.
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Offline AndyspinsTopic starter

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Re: Sharp IR Rangefinder
« Reply #9 on: August 30, 2010, 05:17:41 PM »
you can use just a photoresistor to find color there's an excellent tutorial on sor about that.
Thanks can you link me?

Offline madsci1016

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Re: Sharp IR Rangefinder
« Reply #10 on: August 30, 2010, 05:42:57 PM »
The link given shows a board for a color sensor,

It includes the color sensor, and has all the supporting hardware needed to run the sensor.

Offline AndyspinsTopic starter

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Re: Sharp IR Rangefinder
« Reply #11 on: August 31, 2010, 06:08:07 AM »
The link given shows a board for a color sensor,

It includes the color sensor, and has all the supporting hardware needed to run the sensor.
Oh thanks.

Offline ballbreaker

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Re: Sharp IR Rangefinder
« Reply #12 on: August 31, 2010, 01:28:10 PM »
you can use just a photoresistor to find color there's an excellent tutorial on sor about that.
Thanks can you link me?


http://www.societyofrobots.com/sensors_color.shtml read it all really helps and it can be accurate with the right calculation
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Offline AndyspinsTopic starter

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Re: Sharp IR Rangefinder
« Reply #13 on: August 31, 2010, 03:08:29 PM »
you can use just a photoresistor to find color there's an excellent tutorial on sor about that.
Thanks can you link me?


http://www.societyofrobots.com/sensors_color.shtml read it all really helps and it can be accurate with the right calculation
Thanks, also where is a site that sells most colors of LEDS?

Offline ballbreaker

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Re: Sharp IR Rangefinder
« Reply #14 on: August 31, 2010, 03:35:35 PM »
you can check sparkfun it has leds i dont know if it has all of them but led are easy to find
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Offline madsci1016

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Re: Sharp IR Rangefinder
« Reply #15 on: August 31, 2010, 04:50:23 PM »

Offline AndyspinsTopic starter

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Re: Sharp IR Rangefinder
« Reply #16 on: August 31, 2010, 06:03:25 PM »
Thanks, also where is a site that sells most colors of LEDS?


Digi-key has everything, with prices usually better then SparkFun
Thanks can you give me a pointer on which orange LED would be good?

Offline madsci1016

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Re: Sharp IR Rangefinder
« Reply #17 on: August 31, 2010, 06:10:56 PM »
I could, but you would have to tell me what your goal is, what are you trying to sense?

Usually, a red, green, and blue LED would let you sense every color, it's just a mater of mixing the reads. Orange objects would have a mix of red and green.

Offline AndyspinsTopic starter

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Re: Sharp IR Rangefinder
« Reply #18 on: September 01, 2010, 07:25:23 AM »
I could, but you would have to tell me what your goal is, what are you trying to sense?

Usually, a red, green, and blue LED would let you sense every color, it's just a mater of mixing the reads. Orange objects would have a mix of red and green.
Thanks, I tired the three colors but they didn't have any that had the specs that I want so I found an orange one. Thanks,

                                                              Andyspins

 


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