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Duane Benson
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Fun with sensors
Duane Benson   10/31/2013 6:13:36 PM
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One of the extras I put into the little PIC sensor board is a set of three pins connected to the ADC of the PIC. That way, you can use the same board with the same command set equipped with an ultrasonic sensor or an analog distance measuring sensor.

David Ashton
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cool stuff
David Ashton   10/31/2013 6:48:44 PM
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Very cool stuff Max (and Duane) but one question - what is the LDR for in between the two ultrasonic transducers on the SFR08 module?

Max The Magnificent
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Re: cool stuff
Max The Magnificent   11/1/2013 12:41:00 PM
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@David: I'll let Duane answer this because he has some of those modules -- I'm just going to use the cheap ones :-)

Duane Benson
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Re: cool stuff
Duane Benson   11/1/2013 12:58:10 PM
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David - I don't know why it's there, but one of the I2C commands will return the light level from the LDR.

jjulian274
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Re: cool stuff
jjulian274   11/1/2013 4:41:08 PM
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I'm not sure either, but my guess would be that the LDR is there for a light following robot.  You can follow a light and tell if there are any obsticals in the way.


At least that is why I would put it there.  That's my story and I'm sticking to it.


You could also use it for chasing after a lighted object (say a ball), and use the rangers to guide you in to pick it up.

Paul A. Clayton
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Even neutrinos?
Paul A. Clayton   11/1/2013 7:10:24 PM
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"You name it, and my robot will sense it."

What kind of shielding are you planning to use to minimize false positives in your neutrino sensor? ☺

Are you also planning to detect ionizing radiation? Gas leaks? Carbon monoxide? Pollen/particulate count? (With temperature, humidity, and barometric pressure, the robot might be half way to being a mobile weather station--lacking wind speed and direction and precipitation measurement [perhaps also illumination determination--cloudy, partly cloudy, sunny].)

David Ashton
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Re: Even neutrinos?
David Ashton   11/1/2013 7:49:11 PM
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@Paul....and Duane / Jjulian above... "[perhaps also illumination determination--cloudy, partly cloudy, sunny].)"

THAT'S what you can use the LDR for!@

Crusty1
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Re: cost cutting cool stuff
Crusty1   11/2/2013 4:36:27 AM
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@Max,Duane,David:

Does Max need multiple ultrasonic sensors?

Why not take a leaf out of the radar technology and have a spinning ultrasonic dector turret on the robot. This could be turned by a stepper motor, so you would know where it was pointing relevant to the robots fixed chassis.

It might also look very cool like Robby from the Forbidden Planet ?

 

David Ashton
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Re: cost cutting cool stuff
David Ashton   11/2/2013 6:25:55 AM
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True, Crusty, it would look VERY cool.  And Max has a spare motor driver on his arduino shield, so he could use that to rotate the US rangefinder.  

Max The Magnificent
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Re: cool stuff
Max The Magnificent   11/2/2013 11:09:07 AM
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@jjulian274: You could also use it for chasing after a lighted object (say a ball), and use the rangers to guide you in to pick it up.

That's what I want to use my Pixy Machine Vision sensor for.

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