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Forum Index : Microcontroller and PC projects : Beer quality control with the CMM2
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Nimue Guru  Joined: 06/08/2020 Location: United KingdomPosts: 420 |
In my quest bring the CMM2 to the education masses, I took my previous light sensor / data logger and created a colorimeter. Beer quality control is often done my measuring the light transmittance - and using the aptly named Beer-Lambert law (Beer as in his name!!). Just wrote it up here: https://stem.wales/beer-quality-control.html The CMM2 is proving the right combination of "pick up and go", price and technical capability that is making using single board computers (I know this is more than that) in the classroom as the Arduino / PI are too complex and the MicroBit to too restricted to be useful. Appreciate any input.... Nimue Entropy is not what it used to be |
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TassyJim Guru Joined: 07/08/2011 Location: AustraliaPosts: 6283 |
I like the way you are using simple electronic components for your projects. I would probably use something like the TCS3414 digital colour sensor which is a total over-kill. It brings back memories of my childhood when I played with an electronic version of Lego building blocks. Keep them coming... Jim VK7JH MMedit |
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CaptainBoing Guru Joined: 07/09/2016 Location: United KingdomPosts: 2170 |
In my feed this morning https://hackaday.com/2020/08/24/arduino-rig-does-spectrophotometry/ |
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| Nimue Guru Joined: 06/08/2020 Location: United KingdomPosts: 420 |
Slightly more complex - with a rotating LED source --- I only used a white LED as this is what is common in schools. I should have used a multicolour LED. Next time. Shows what the community can make though. Good share. Nim Entropy is not what it used to be |
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| CaptainBoing Guru Joined: 07/09/2016 Location: United KingdomPosts: 2170 |
do you mean the neo-pixel ring on the front? I think that is eye-candy(?). In the vid the narrator says "you can hear the servo rotating the prism". I didn't watch the vid right through but my guess was a white light source (hopefully not a white LED as they have a constrained spectrum) dunno... |
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| zeitfest Guru Joined: 31/07/2019 Location: AustraliaPosts: 582 |
Prob a tad expensive but... tiny spectrometer |
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| Nimue Guru Joined: 06/08/2020 Location: United KingdomPosts: 420 |
Lush - I want one. Wonder if they'll send me a sample? My perspective here wasn't to really produce a fully functionally commercial grade device, but rather to show my students that things are not just "black boxes" and that they can construct similar for a fraction of the cost --- almost like 80% of the functionality for 20% of the price. In education land we tend to subscribe to the mantra that we need to buy "kit" that has been designed for use in education. When our students enter higher education or the real world, they then never see these "magic" boxes. Raspberry PI and Arduino are the same -- schools pitch them as devices that drive esoteric things like robots that follow lines -- and somehow miss the more mundane uses - things like controlling the temperature in my fish tank with a sensor and heating mat... in this area the CMM2 excels -- easy to wire up and a breeze to code for. IMHO the CMM2 is an ideal, low cost general purpose data control and acquisition device -- would love to add some examples of its use in this manner to the "Welcome Tape". Nim Entropy is not what it used to be |
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| zeitfest Guru Joined: 31/07/2019 Location: AustraliaPosts: 582 |
For the same price you can probably get a whole classroom of 'duinos - and they work well - then you are caught on the hook of course !! |
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| Volhout Guru Joined: 05/03/2018 Location: NetherlandsPosts: 5091 |
Hi zeitfest, Not really, each 'duino' needs a PC or laptop. Where the CMM2 can live with a monitor and keyboard. Even the old tube monitors will do. PicomiteVGA PETSCII ROBOTS |
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| Nimue Guru Joined: 06/08/2020 Location: United KingdomPosts: 420 |
This is the very reason I'm loving the CMM2 - it breaks me away from reliance on an actual PC code / demo / make -- as a result it is far easier to use with students in class rooms IMHO. Entropy is not what it used to be |
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| TassyJim Guru Joined: 07/08/2011 Location: AustraliaPosts: 6283 |
That's what I like about your work. I expect you get enjoyment out of seeing your students suddenly understand what's happening. The first day I went to university, I was told "You thought you were here to learn to be engineers. Wrong. You're here to learn how to learn." Jim VK7JH MMedit |
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| zeitfest Guru Joined: 31/07/2019 Location: AustraliaPosts: 582 |
Just out for interest in peoples's patterns of education and tech - which uni was that ? What were the engineering courses, I guess B. Eng. ? Ed - The unis have been very badly hit by Covid-19... with most courses now all on-line, and the whole scenario scarcely recognisable. I wonder what will be the results in the next years. Edited 2020-08-29 14:05 by zeitfest |
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| TassyJim Guru Joined: 07/08/2011 Location: AustraliaPosts: 6283 |
Uni of Queensland at St Lucia (Brisbane). Electrical Engineering. That was back when there was only one university in Queensland. Now they seem to be everywhere. Jim VK7JH MMedit |
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| zeitfest Guru Joined: 31/07/2019 Location: AustraliaPosts: 582 |
They sure do. Sad to see how many of the newer ones are just chasing the dollar. |
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