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10Instructables755,139Views223CommentsSeattle, WAJoined March 12th, 2010
Hi, I'm Rich Olson (nothinglabs.com). I sell cloud chambers for viewing radiation, make robots and dev software. If you need something prototyped - I might be able to help.

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  • Make a Cloud Chamber Using Peltier Coolers

    I have made some effort to scale things up a bit - but making things bigger gets tricky / I have not had a lot of luck..I know some people out there have had some luck:http://www.jonshobbies.com/tec-cloud-chamber-proje...All the values I've come up with are base on experimenting (less on modeling). One thing to keep in mind is the bottom cooler has to pump all the heat the top one does + any excess heat made by the top cooler. So - logically the bottom cooler should consume a -bunch- more power than the top one. Beyond that - mostly just guessing.Have fun / all the best!-Rich

    Sorry for delayed response.You could try this ATX breakout board to simplify use of an ATX power supply:https://www.seeedstudio.com/atx-breakout-board-ben...Good luck!

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  • Make a Cloud Chamber Using Peltier Coolers

    Sorry for the much delayed response.It sounds reasonable at 12706 run at 12v on bottom and a 12706 on top at 3v would provide good results. I've definitely gotten useful results using the same model of peltier top-and-bottom.I've generally found optimal results using a smaller-value peltier on the top - than on the bottom. However - using too large a peltier on the bottom can result in issues supplying adequate current - or adequate heat dissipation. Too small a peltier on the top results in not enough heat being pumped.I've found getting things working is part-science / part-art. If it's working for you - you're doing it right!Good luck!-Rich

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  • Make a Cloud Chamber Using Peltier Coolers

    Yes. There are a lot of minor variations that work. I might try a 12706 on top, and a 12710 on bottom. Very likely that combination could produce useful results.(don't know anything about the AJ models)Good luck!-Rich

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  • Make a Cloud Chamber Using Peltier Coolers

    Issue isn't with sealing of the chamber - but rather that all the alcohol eventually precipitates down to the bottom.I think someone out there managed to solve this by placing the entire chamber -slightly- at an angle - and then have the alcohol puddle wick back up to the top using a sponge... (might be a youtube video out there..)

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  • Make a Cloud Chamber using Peltier Coolers

    Hi Castor!‚ÄčThe 19012-5L31-06CQQ dual-stage peltier from Custom Thermoelectric can easily be run off a 12v / 6 amp power supply (I've used 5 amps before without problems). You can get power supplies of this size for around $10-15 online sold as for use with LED strip lighting (Amazon has a number of options).This forum post suggests current needs for the Corsair are under an amp:http://forum.corsair.com/v3/showthread.php?t=10036...Think you'd be fine running everything off the same 6 amp / 12v supply.Best of luck with your build!-Rich

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  • Make a Cloud Chamber using Peltier Coolers

    awesome! video link isn't working... have it posted someplace else?

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  • Easy, Reversible Motor Control for Arduino (or any Microcontroller)

    Maybe check your connections again? Did you ever plug anything in backwards? Does your power supply provide enough current to turn the motor?

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  • Make a Cloud Chamber using Peltier Coolers

    when people ask about the static source i tend to wave my hands and say it "makes it better". at least part if it may have to do with "clearing" particles ionized by the radioactive source. so - it makes sense it would be less of issue with weak background radiation "source"glad you got it working!-Rich

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  • Arduino Laser Show with Full XY Control

    Arduino Nano should be same as other atmega328-based arduinos (see code for this project).

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  • Make a Cloud Chamber using Peltier Coolers

    sounds like a good option to me!

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  • Make a Cloud Chamber using Peltier Coolers

    If the 12709 is on top - it should be run at a lower voltage than the one at the bottom. Range of 3v-6v produces is likely best.If you try to run the voltage higher - the larger peltier on the bottom won't be able to pump the extra heat - and the total cooling effect will be reduced.

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  • Arduino Laser Show with Full XY Control

    sorry for slow response...interesting idea - but I don't think the BLDC motors have any kind of "centering" mechanism. I can imagine they might vibrate as opposed to just spin - but I wouldn't expect them to provide a consistent position based on voltage like the speakers do.good luck!-Rich

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  • Make a Cloud Chamber using Peltier Coolers

    Glass can work fine - although I'd suggest thin plastic / fiberglass for the base.Aluminum base will most likely cause grief. It will disperse the cooling effect over a larger area - and result in a larger somewhat-cold area - as opposed to small very-cold area. Good luck!-Rich

    Hi there - sorry for delay in responding...It's pretty hard to speculate too much without a temperature reading - but there are some common issues...Yes - static source is nothing special. Styrofoam cup you've rubbed in your hair should work fine...Are you sure you're power supply is providing enough current?Are you sure both peltiers are working? (try them separately...)Is the bottom of your chamber colored black somehow? It's really impossible to see the vapor against a white surface.Are you use an LED light? If you're having problems with alcohol pooling - try wiping it off with a paper towel... Try using -less- alcohol (just let the sponge air our a bit - then try again)...Just a few things to check... hope this helps!-Rich

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  • Make a Cloud Chamber using Peltier Coolers

    You'll get a useful viewing surface of about 40mm x 40mm.If you try placing an aluminum plate on top - it probably won't increase your viewing area a useful amount. You generally end up cooling a larger area - but it won't get as cold (likely not cold enough). Suspect having two peltiers on top in parallel would result in trying to pump too much heat into the bottom peltier to be effective. That said - I don't recall if I've tried that particular setup. If you do - please post here!Good luck!-Rich

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  • Easy, Reversible Motor Control for Arduino (or any Microcontroller)

    Sorry for slow response...Not sure why it would be doing that... wondering if maybe the power source is experiencing some voltage sag when the relay is engaged?also - some motors are "timed" so they spin faster one direction than the other...-Rich

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  • Make a Cloud Chamber using Peltier Coolers

    Sorry for slow reply.Definitely put the 12712 on the bottom. Both those peltiers are going to try to draw a lot of current.I would try running the bottom peltier (12712) at 10-12v - it will draw something around 8 to 12 amps at those voltages. Try to find a beefy power supply.I'd run the top 12710 at about 3-6v. Expect 2-5 amps current draw.Good luck!-Rich

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