A neat activity that combines all elements of STREM

[Chhaya, Harshal S.]

 

Karlheinz Haas shared this neat activity on X/Twitter earlier this week

 

He put a Vernier Go Direct light sensor on a TI-Rover and programmed it to move away from the source at a steady pace.

Another TI-Nspire CX II collected the data (wirelessly through the TI Bluetooth Adapter) and stored it for analysis.

 

[I think (and Karlheinz can correct me) that the wireless data collection isn’t essential to the activity – you could do it with a wired light sensor too.

But it’s cool because this way you include some Python coding 😊]

 

When the time (a proxy for distance) vs intensity was plotted, the result was a beautiful illustration of the exponential decay.

 

 

I really love how this combines coding and robotics and science and math and real-world data collection to illustrate the physical phenomenon.

 

Regards,

- Harshal

 

 

--

Harshal S. Chhaya, Distinguished Member of Technical Staff (Emeritus)

Product Manager, STEM and robotics

Manager, Robotics outreach

TI robotic vehicle for education: http://education.ti.com/rover

 

 

[John Hanna]

“(a proxy for distance)”

 

VERY clever!

Regards,

     John

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[kh7...@gmail.com]

Harshal,

Thanks for the kind words. 

Yes, you are correct, the wireless data collection isn’t essential to the activity. Before using the Bluetooth adapter, my students would do the experiment with the (wired) Vernier light sensor with Easy Link to connect it to the second handheld. They just walked along with the moving Rover. 

Another way to do it is to attach a Grove light sensor to the front of the Rover and connect it directly to the Hub in the Rover.

But since doing the experiment in a completely darkened room to avoid ambient light results in much better data, doing it wirelessly just makes it so much easier.

Karlheinz

[HMH]

Hi Karlheinz,

Just being curious: Have you tried using the built-in light sensor of the TI-Hub located at the rear of the Rover? I think this should work fine as long as the light source is located close to the surface. This would be an all-integrated solution, the code would make the Rover start moving forward, away from the light source located at the rear. Once started, you sample the light sensor in a while loop, until the Rover has completed its path. Then you export the list to a L&S window, displayed on the Rover's CXII HH.

I've used the Hub's rear light sensor as a kind of a remote control with a flashlight, to make Rover start backing out of its 'garage' in my Tello Video :-).

 

Best,

Hans-Martin

[John Hanna]

I completely FORGOT about BRIGHTNESS on Innovator: it’s been awhile!

 

 

Regards,

     John

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[kh7...@gmail.com]

Hello Hans-Martin,

Yes, prior to the availability of Bluetooth adapter to use GoDirect sensor, I had done the activity in a variety of ways.  One of them was using the Grove light sensor. Another was to use DataQuest and Vernier's wired light sensor. Not sure we ever tried the built-in brightness sensor.......

This idea of using the Bluetooth adapter and GoDirect light/color sensor really kind of came up when John and I were thinking about activities for our T3IC session(s). Activities that could actually benefit from having the TI-Bluetooth adapter with GoDirect sensors.

Everybody's contributions here and the discussion and suggestions that followed Harshal's original post of the idea just shows how the same concepts can be taught in a variety of ways and that not having access to one kind of tool or not wanting to use code, or ....... whatever, should not be a reason to not integrate data collection in one's lessons.

Karlheinz