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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..)
Hi Castor!The 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
awesome! video link isn't working... have it posted someplace else?
Maybe check your connections again? Did you ever plug anything in backwards? Does your power supply provide enough current to turn the motor?
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
Arduino Nano should be same as other atmega328-based arduinos (see code for this project).
sounds like a good option to me!
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.
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
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
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
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
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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