DMT-Nexus member
Posts: 2291 Joined: 26-Mar-2008 Last visit: 12-Jan-2020 Location: The Thunderbolt Pagoda
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This one's a given: Hotplate/Magnetic Stirrer <$30But this one's a personal favorite: http://www.instructables.com/id...Stirring-Mug-using-Lego/ The lego one would be perfect for salting and preparing FASW--possibly even for making lattes.
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DMT-Nexus member
Posts: 2291 Joined: 26-Mar-2008 Last visit: 12-Jan-2020 Location: The Thunderbolt Pagoda
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It looks like the simplest, most common way to construct one is to glue what they call a rare earth magnet, from a hard drive, onto a computer fan and find a way to power it and control speed (the second video that builds one from scratch is a cheap alternative if you don't already have these items ready on hand). Throw a thermoelectric cooler on top as a heating element if so desired. Here's a video for the first one in the OP: I still think the lego method is the coolest way, but I wonder if the heating element could be implemented without melting the legos.
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DMT-Nexus member
Posts: 1689 Joined: 18-Jan-2008 Last visit: 18-Apr-2015
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Excellent thread amor! bumped for later! shoe
реР рднреВрд░реНрднреБрд╡: рд╕реНрд╡: рддрддреНрд╕рд╡рд┐рддреБрд░реНрд╡рд░реЗрдгреНрдпрдВ ред рднрд░реНрдЧреЛ рджреЗрд╡рд╕реНрдп рдзреАрдорд╣рд┐, рдзреАрдпреЛ рдпреЛ рди: рдкреНрд░рдЪреЛрджрдпрд╛рддреН Love, Gratittude, Compassion, Fearlessness!
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DMT-Nexus member
Posts: 341 Joined: 15-Oct-2009 Last visit: 11-Oct-2012
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Hot-plate is kind of bunk.
The stirrer's look decent.
Honestly though, if your going to spend 30 on a stirrer and like 15 on a dodgy hot-plate you might as well buy a used real hot-plate imo. Not trying to knock innovation! Just throwing it out there.
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DMT-Nexus member
Posts: 2291 Joined: 26-Mar-2008 Last visit: 12-Jan-2020 Location: The Thunderbolt Pagoda
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Metta wrote:Honestly though, if your going to spend 30 on a stirrer and like 15 on a dodgy hot-plate you might as well buy a used real hot-plate imo. Not trying to knock innovation! Just throwing it out there. The whole thing with the stirrer and hotplate is less than $30. SWIM probably wouldn't need temps much higher than those of this hotplate. Whether it's found useful for chemistry purposes or not, the temp should be perfect for making lattes, so there's always that In any case the I'm most fond of the lego one, and I've already got all the parts besides the motor and power-source on-hand.
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DMT-Nexus member
Posts: 30 Joined: 18-Jan-2008 Last visit: 26-Aug-2017 Location: South east USA
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I made this stirrer out of an old cd player. I mounted a fan on the vibration isolator that the laser was mounted to. Used the power button on the front and wired in a speed controller. The second pic shows the adjustment knob of the speed controller and a cool vortex in the jar. It was a lot of fun to make. That being said,it works ok for small jobs and doesn't for large or thick jobs. If you can get a cheap one BUY it. The hotplate would be very useful also. CHAOS Chaos attached the following image(s): 100_2650.JPG (495kb) downloaded 301 time(s). 100_2652.JPG (670kb) downloaded 300 time(s).My journey starts today.
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DMT-Nexus member
Posts: 557 Joined: 09-Sep-2009 Last visit: 26-Jun-2012
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How did you wire in the speed controller? Swim used to have one of these for yeast but could never control the speed.
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DMT-Nexus member
Posts: 1689 Joined: 18-Jan-2008 Last visit: 18-Apr-2015
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haha, thats awesome! Im guessing you just liked the CD player casing for durability? shoe
реР рднреВрд░реНрднреБрд╡: рд╕реНрд╡: рддрддреНрд╕рд╡рд┐рддреБрд░реНрд╡рд░реЗрдгреНрдпрдВ ред рднрд░реНрдЧреЛ рджреЗрд╡рд╕реНрдп рдзреАрдорд╣рд┐, рдзреАрдпреЛ рдпреЛ рди: рдкреНрд░рдЪреЛрджрдпрд╛рддреН Love, Gratittude, Compassion, Fearlessness!
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DMT-Nexus member
Posts: 262 Joined: 15-Sep-2009 Last visit: 26-Sep-2010
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impressive, but slightlydangerous R*R L Much respect to all from L_Star
Disclaimer: EVERYTHING posted by L_Star is said from the following persons: SWIM. All are hypothetical posts and are not endorsements of any activities, beliefs, and practices stated, that may be correlated with the person stated, or another person posting, or third party user, in anyway on dmt-nexus.com. All that is said is for educational purposes and as said is "hypothetical" and therefore cannot be taken for true accounts. SWIM and L_Star abide by the Law in all practices. SWIM would like reader to note that SWIM is blind, and L_Star is a typing assistant voluntering for SWIM. L_Star is bound by legal legislation for customer privacy by Data Protection Act, therefore SWIM will not be identified.
Regards L_Star
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DMT-Nexus member
Posts: 2354 Joined: 24-Jan-2010 Last visit: 21-Jun-2012 Location: Massachusetts
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Another instruction set for building your own. PK Dick is to LSD as HP Lovecraft is to Mushrooms
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DMT-Nexus member
Posts: 764 Joined: 18-Jan-2008 Last visit: 20-Mar-2023
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ragabr wrote:Another instruction set for building your own. It seems that to build an overhead stirrer and a separate hotplate would be much more practical. Magnetic stirrers are very limited in respect of volume and viscosity of the medium they can stir. Swim's professional magnetic stirrer was useless for stirring 3 l of thick aqueous solution during an STB extraction. It is also a problem to combine a magnetic stirrer and a hotplate. Excessive heat can destroy a permanent magnet and over heat wiring of your electric magnet. Any variable speed rotary tool (Dremel?) would do. With sufficient power you can stir almost anything. Of course you would need a lab stand to fix it and a non-reactive shaft with a propeller to stir your liquid. Do not seek the truth, just drop your opinions.
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DMT-Nexus member
Posts: 149 Joined: 06-May-2009 Last visit: 29-Dec-2013
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I once built a homemade magnetic stirrer for propagating yeast cultures to be used in brewing large batches of beer. It's been a while, but I'm pretty sure the instructions I (more or less) used can be found here. It works pretty well with 500-1000ml of thin liquid, but did almost nothing for a decent sized STB or anything much thicker than the consistency of water. I've since purchased a used lab-grade Corning hotplate/stirrer from eBay and it was the best investment I've made since picking up my 1000ml sep funnel. It's certainly not the cheapest way to go and there's no DIY fun involved, but it's extremely reliable even for thick soupy mixtures of 2L or more. The stirrer can virtually create a vortex in mud and it heats up to 550C . If I remember correctly it cost a little over $100. Don't get me wrong, I absolutely love DIYers/'makers' and amateur innovation. But for my purposes the professional-grade stirrer was necessary to get the job done effectively.
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DMT-Nexus member
Posts: 664 Joined: 07-Sep-2010 Last visit: 14-Nov-2016 Location: europe
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hahahha omfg!!this lego stirrer seems to work better than my real magnetic stirrer. you can find teflon-covered magnets to put into the jar so they wouldnt' encrust and they're almost inerts to most of chemicals Tz'is aná
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