Author Topic: EEVblog #776 - World's Smallest Digital Dosimeter  (Read 40023 times)

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EEVblog #776 - World's Smallest Digital Dosimeter
« on: August 04, 2015, 03:00:56 pm »
A look at the Ultra Micron, the world's smallest digital ionising radiation dosimeter, and it's Open Source Hardware.
https://github.com/shodanx/ultramicron

 

Offline alimirjamali

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Re: EEVblog #776 - World's Smallest Digital Dosimeter
« Reply #1 on: August 04, 2015, 03:39:38 pm »
I wish if Andrey sold this device.  :( He did an excellent job

The Windows software is available on his Github repository which is written in Delphi. Should be very easy to translate to English.

Thank you very much Dave for review and tear-down  :-+
 

Offline nitro2k01

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Re: EEVblog #776 - World's Smallest Digital Dosimeter
« Reply #2 on: August 04, 2015, 05:19:50 pm »
What I want to know is how well it can tolerate higher radioation levels, in terms of not crashing and so on. Do rad hardened micros come in such small packages?
Whoa! How the hell did Dave know that Bob is my uncle? Amazing!
 

Offline sergey

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Re: EEVblog #776 - World's Smallest Digital Dosimeter
« Reply #3 on: August 04, 2015, 06:41:25 pm »
Very nice, Andrey! :)

Dave, uR/h is rather quite common in russia actually, so not a problem here at all :) And thanks for the teardown!
 

Offline Artlav

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Re: EEVblog #776 - World's Smallest Digital Dosimeter
« Reply #4 on: August 04, 2015, 07:33:46 pm »
Tried to translate the software, but it won't compile for me. Needs some post-7 (and so braindead) version of Delphi.
So i only translated the screenshots:



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Offline dadler

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Re: EEVblog #776 - World's Smallest Digital Dosimeter
« Reply #5 on: August 04, 2015, 10:54:50 pm »
I really want one of these!
 

Offline shodan@micron

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Re: EEVblog #776 - World's Smallest Digital Dosimeter
« Reply #6 on: August 04, 2015, 11:00:25 pm »
it project also have monitoring web service!!!
maps
station graphs

Yes is of course Russian language, because this project not to advertise to other country until today. Some Ultra-Micron's register on it, and send data to web frequently.... some not...
If someone assembling dosimeter, i started adapt language.

If somebody have one dosimeter, build it, for yourself!

In YouTube comments people tell me about start mass production, but i do not like commerce. This is my hobby!

If you have question you can write it to my conctact page (Google translate is trash :) ) or ask on this forum but is slower.
« Last Edit: August 04, 2015, 11:18:38 pm by shodan@micron »
 

Offline LabSpokane

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Re: EEVblog #776 - World's Smallest Digital Dosimeter
« Reply #7 on: August 04, 2015, 11:15:03 pm »
Wow!  I thought I had seen a small dosimeter until now.  It'll be interesting to see what shows up in the nuclear pavilions at the power trade shows with this new benchmark.
 

Offline shodan@micron

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Re: EEVblog #776 - World's Smallest Digital Dosimeter
« Reply #8 on: August 04, 2015, 11:26:28 pm »
What I want to know is how well it can tolerate higher radioation levels, in terms of not crashing and so on.

I've tested it to 800 000 uR/h. (more 40 000 times of normal background radiation)
More radiation level cant use for me.

Theoretically it can success measured up to 1 000 000+ uR/h
« Last Edit: August 04, 2015, 11:36:10 pm by shodan@micron »
 

Offline Stonent

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Re: EEVblog #776 - World's Smallest Digital Dosimeter
« Reply #9 on: August 04, 2015, 11:28:26 pm »
Datasheet for the SBM-10 http://www.gstube.com/data/2396/

More info about Soviet surplus tubes: https://sites.google.com/site/diygeigercounter/gm-tubes-supported

The SBM-10 is not particularly sensitive tube, but it is small.

If you remove the inside of the smoke detector from the housing, you can get a lot more activity from the Americium.

Another interesting thing to test is Potassium Chloride, sold as "Lite salt" or sodium free salt.  Potassium and Potassium chloride typically contain enough K-40 in it that it will increase your activity by several ticks per minute.  It's not dangerous, it's just that's the way Potassium exists in nature.

Another thing to keep in mind is dosage is highly dependent on the material being tested.  A geiger tube is only a counter. It has no ability to measure magnitude.   As far as it is concerned, one click of Potassium 40 is the same as one click of Plutonium.  So the meter has to be calibrated to the sample.   You could think of it as a device that counts cars passing by on the road. A Smart car is the same as a 18 wheeled diesel truck.  Typically counters are calibrated to CS-137 or in the case of the CDV-700 counter I have, calibrated to depleted uranium.

If you did want to measure magnitude of unknown samples, you'd need a scintillation counter.

So if you are measuring to anything other than it is calibrated to, make sure if you know what you're measuring, do some googling and see how you can covert counts to sieverts for your sample.

And remember, half-lives have to do with how much radiation is spewing out.  Short half-lives mean lots of radiation, long half-lives mean slow emissions.
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Offline jnissen

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Re: EEVblog #776 - World's Smallest Digital Dosimeter
« Reply #10 on: August 05, 2015, 12:04:33 am »
Dave, if your interested you may be able to interface the dossimeter into a world map. I am using the following service as it's free and the guys here support many different devices. Perhaps they can support your meter? Give them a try.

http://radmon.org/
 

Offline elektronaut

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Re: EEVblog #776 - World's Smallest Digital Dosimeter
« Reply #11 on: August 05, 2015, 01:55:49 am »
That's a really nice dosimeter.
Can this one be used in an environment where one is prone to be exposed to X-rays?
In other words in situations where the exposure is very short but somewhat intense.
 

Offline Someone

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Re: EEVblog #776 - World's Smallest Digital Dosimeter
« Reply #12 on: August 05, 2015, 02:04:47 am »
Argh, never heard anyone pronounce it that way before. The manufacturers videos and professionals I have worked with always pronounced it "dose-im-eter" emphasis on its function of estimating dose.
That's a really nice dosimeter.
Can this one be used in an environment where one is prone to be exposed to X-rays?
In other words in situations where the exposure is very short but somewhat intense.
The detector used in this small unit is sensitive almost exclusively to gamma radiation, it would be a very poor choice as a general purpose dosimeter or for use with narrow energy emitters such as x-ray equipment. They are intended for consumers worried about nuclear hazards.
 

Offline Pentium100

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Re: EEVblog #776 - World's Smallest Digital Dosimeter
« Reply #13 on: August 05, 2015, 03:16:52 am »
I noticed one mistake in the display. The dosimeter displays uR/h current level, but then the day dose is in uRh. Why? Roentgen is a measure of dose, you do not need to multiply it by hours. For example, joules - you can measure power in J/h, but won't measure the total energy in Jh.

I know this is pedantic, but for some reason I really notice this kind of mistake. For example, saying that a lightbulb uses 100W/h.
 

Offline 99tito99

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Re: EEVblog #776 - World's Smallest Digital Dosimeter
« Reply #14 on: August 05, 2015, 03:50:56 am »
Hi Folks,

MegaNubie question/request: Can someone point me in the right direction to cut-my-teeth on understanding GitHub?

I'm opening and looking at files and it's a bit of a train-wreck in my brain.

Cheers,
Mark
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Offline elektronaut

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Re: EEVblog #776 - World's Smallest Digital Dosimeter
« Reply #15 on: August 05, 2015, 04:00:23 am »
Can someone point me in the right direction to cut-my-teeth on understanding GitHub?
I'm opening and looking at files and it's a bit of a train-wreck in my brain.

In the readme.md file this links shows up ftp://www.xn--80aighkbzclf7a.net/%D0%94%D0%BE%D0%B7%D0%B8%D0%BC%D0%B5%D1%82%D1%80%D1%8B_%D0%9C%D0%B8%D0%BA%D1%80%D0%BE%D0%BD/%D0%A3%D0%BB%D1%8C%D1%82%D1%80%D0%B0-%D0%BC%D0%B8%D0%BA%D1%80%D0%BE%D0%BD/ here you can download all files in a simple way
 

Offline 99tito99

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Re: EEVblog #776 - World's Smallest Digital Dosimeter
« Reply #16 on: August 05, 2015, 05:02:36 am »
Can someone point me in the right direction to cut-my-teeth on understanding GitHub?
I'm opening and looking at files and it's a bit of a train-wreck in my brain.

In the readme.md file this links shows up ftp://www.xn--80aighkbzclf7a.net/%D0%94%D0%BE%D0%B7%D0%B8%D0%BC%D0%B5%D1%82%D1%80%D1%8B_%D0%9C%D0%B8%D0%BA%D1%80%D0%BE%D0%BD/%D0%A3%D0%BB%D1%8C%D1%82%D1%80%D0%B0-%D0%BC%D0%B8%D0%BA%D1%80%D0%BE%D0%BD/ here you can download all files in a simple way

Hi elektronaut:

Thanks, that focused me in and helps a lot.

Cheers,
Mark
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Offline shodan@micron

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Re: EEVblog #776 - World's Smallest Digital Dosimeter
« Reply #17 on: August 05, 2015, 05:31:53 am »
but then the day dose is in uRh. Why?

Yes, you are right! This error i add then change firmware language. In original stuff it looks right.  Thanks, i fix it!
 

Offline TiN

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Re: EEVblog #776 - World's Smallest Digital Dosimeter
« Reply #18 on: August 05, 2015, 12:19:51 pm »
Nice piece of russian engineering :)

And meanwhile, EEVBlog not supporting russian language posts!?

P.S. ??????? ??????, :) Nah, not supporting, changes posts/PMs to bunch of questions marks. ??? :)
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Offline Rubi

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Re: EEVblog #776 - World's Smallest Digital Dosimeter
« Reply #19 on: August 05, 2015, 02:34:43 pm »
Hi

Since it's open source hardeware where can I find the pcb files ?
I could not find them in the github folder, did I overlook something ?
I would love to build one.

Cheers
Michael

EDIT
Please excuse, after removing the tomatoes from my eyes I found the pcb files and ordered them from osh park.
8$ for three pcbs, awesome!

« Last Edit: August 05, 2015, 02:40:06 pm by Rubi »
 

Offline bitwelder

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Re: EEVblog #776 - World's Smallest Digital Dosimeter
« Reply #20 on: August 05, 2015, 05:07:54 pm »
Hats off to Andrei for making this little beauty!  :-+

Besides, looking at the files in www.xn--80aighkbzclf7a.net I see that before Ultra-Micron there was a Micron project, running several versions, with older versions dating back to 2012.
So the device we saw in Dave's hands is likely the result of a long evolution process.

Thanks also for releasing it as open source.
 

Offline LabSpokane

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Re: EEVblog #776 - World's Smallest Digital Dosimeter
« Reply #21 on: August 05, 2015, 05:16:00 pm »
Shodan,

I forgot to thank you.  Projects like this are what make it fun to visit here.  Nice work!!
 

Offline SEKCobra

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Re: EEVblog #776 - World's Smallest Digital Dosimeter
« Reply #22 on: August 05, 2015, 06:06:57 pm »
Man, I'd love this as a kit, maybe a bit more rugged case (Like Honeywell CO Warners maybe?).
 

Offline shodan@micron

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Re: EEVblog #776 - World's Smallest Digital Dosimeter
« Reply #23 on: August 05, 2015, 08:03:18 pm »
Please excuse, after removing the tomatoes from my eyes I found the pcb files and ordered them from osh park.
I recommend use Seeedstudio, because it have better "Annular Ring" PCB limitations.

bit more rugged case
This case(from Dave video), the best and small what i can found.
Key thing it is small.
As one option to order the plastic case molding in the factory, but it is very expensive.

I thanks to everyone!
I was interested to read the comments.
Glad that you liked the project.

No, i not sell "kit".
But if you can find more 60% components yourself, maybe i can help you.... i can send to you rare components by mail.

Sometimes i sell 1-3 pieces(fully assembled device), but it very expensive price. Therefore i recommend bying components and assembly it yourself, it more cheaper.
« Last Edit: August 05, 2015, 08:29:18 pm by shodan@micron »
 

Offline Stonent

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Re: EEVblog #776 - World's Smallest Digital Dosimeter
« Reply #24 on: August 05, 2015, 11:30:33 pm »
Please excuse, after removing the tomatoes from my eyes I found the pcb files and ordered them from osh park.
I recommend use Seeedstudio, because it have better "Annular Ring" PCB limitations.

bit more rugged case
This case(from Dave video), the best and small what i can found.
Key thing it is small.
As one option to order the plastic case molding in the factory, but it is very expensive.

I thanks to everyone!
I was interested to read the comments.
Glad that you liked the project.

No, i not sell "kit".
But if you can find more 60% components yourself, maybe i can help you.... i can send to you rare components by mail.

Sometimes i sell 1-3 pieces(fully assembled device), but it very expensive price. Therefore i recommend bying components and assembly it yourself, it more cheaper.

Well one thing I like is if you have the full schematic, you can modify it as needed.
For instance building the HV section and then being able to sample the voltage would be what I would be most interested in.  As long as I can get pulses from that, I could use another MCU if I'm more comfortable with it.
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