Magnetic mixer

[Dusif]

Hey all, im making a magnetic mixer to mix eliquids in, im going to make it with a total size of H150mm x D150mm x W150, i have ordered all the parts im going to need to build it (except for the case material, that i can get locally) but now im considering adding a hotplate to it... The only problem is i cant find one bigger than 40x40mm, im uncertain if it would be enough...

Give me your two cents so i can order the hotplate if the majority would find it a good idea


__________________________
Hades 0,9 aqua/0,3 hades dripper
Hades 1,1 russian/0,4 stiletto
M16 helio 0,29
Galileo aqua 0,8
Bolt carto tank
Vamo vivi/protank
Kts+ igo-w 0,7

 

[jmunk]

I would be very interested in your build any chance you could share your design or drawing

 

[oplholik]

Yeah, same here, would like to see what you come up with.

 

[rowdyplace]

Here is the one I built last week for less than $5.00. https://www.youtube.com/watch?v=23mTMC_3afE

If interested, I'll take pics of the innerds and provide a schematic and parts list.

I found the wooden box - kinda like a cigar box. The motor is a PC fan from a dead PC. I will look up the ebay listing for the cheap magnets. I did purchase a motor speed controller for about $4.00. I'll include that listing as well - if yall want.

I even built the spinner bar from an old ball point pen.

That is a 1 foot ruler laying on top. I was taking measurements...

 

[Dusif]

I wasnt planning on taking pictures, but i am now...

So far i have ordered

120mm fan
Voltage controller
A tip switch
40x40mm thermoelectric cooler
And im thinking of ordering another voltage controller for the thermoelectric cooler

And for the casing in planning on using clear 3mm plexiglass


__________________________
Hades 0,9 aqua/0,3 hades dripper
Hades 1,1 russian/0,4 stiletto
M16 helio 0,29
Galileo aqua 0,8
Bolt carto tank
Vamo vivi/protank
Kts+ igo-w 0,7

 

[rowdyplace]

Yours is sounding quite nice. I am anxious to see it.

I never thought of the thermoelectric cooler. Will you share your thoughts on using this - I am most interested. I felt that anything between the rotating magnet(s) and the bottom of the flask/beaker (except for the flat platform) would interfere with the magnetic field. (I'm a hobbyist - not an engineer or chemist.)

I'll take several pictures of mine later today and publish them here.

 

[Dusif]

Well i was thinking i would make a 41x41mm cut into the plexiglass plate (using a scalpel and some patience) lay it all on the table so its even and then hot glue the cooler onto the case, the backside should be cool so a small overlapping ammount of glue should do just fine


__________________________
Hades 0,9 aqua/0,3 hades dripper
Hades 1,1 russian/0,4 stiletto
M16 helio 0,29
Galileo aqua 0,8
Bolt carto tank
Vamo vivi/protank
Kts+ igo-w 0,7

 

[rowdyplace]

I like the idea of the heater as well as your approach. Gonna publish some picture of mine later.

Right now I'm building a flavorings depository to hold about 350 of the little 10 ml bottles in a 6 drawer (12" x 12" x 2.5". I'm working with the 1 inch thick Styrofoam sheets to hold them neatly in place. You ever try to put that many 3/4" holes in styrofoam - neatly?

 

[Goompa]

I had the same idea about adding some sort of heating element to my DIY Stir Plate.

https://www.youtube.com/watch?v=VW5bGJ1Bwfk

My first thought was to use something like my coffee cup warmer:

It did get over 120 d F but took a long time.

Then I thought about a hot plate from an old coffee maker:


1300 watts at 120 vac should do the job. Lots of neat parts to salvage too!

However, I'm already using 12 volts DC to power my mag mixer (old computer fan + PWM control + 12 VDC wall wart), and I didn't really want to have high voltage AC to mess with.

Started looking at low voltage heating foil, and specifically at the heating pads used in handlebar grip warmers. The right size, plenty warm, operates from 12 volt DC power and easy to control.

That's when I found this:


From this website:
http://www.adafruit.com/products/1481

The specs are pretty impressive, operated from 5 - 12 vdc, thin and flexable, and very inexpensive! So I ordered 2 of these, and a couple MOSFETS. Likely put together a simple 555 timer PWM circuit for control.

They aren't here yet, but I hope to have some time to in the next couple of weeks to at least experiment with these and see what they are capable of.

I'd like to hear what others might have found for low voltage heating elements that could work for a heated bed.

 

[Dusif]

I like the idea of the heater as well as your approach. Gonna publish some picture of mine later.

Right now I'm building a flavorings depository to hold about 350 of the little 10 ml bottles in a 6 drawer (12" x 12" x 2.5". I'm working with the 1 inch thick Styrofoam sheets to hold them neatly in place. You ever try to put that many 3/4" holes in styrofoam - neatly?

I used to build rc planes out of that stuff... If youre using the regular white foam thats used for packing furniture and stuff stop what youre doing and get the dense blue foam... Its so much easier to work with


__________________________
Hades 0,9 aqua/0,3 hades dripper
Hades 1,1 russian/0,4 stiletto
M16 helio 0,29
Galileo aqua 0,8
Bolt carto tank
Vamo vivi/protank
Kts+ igo-w 0,7

 

[Dusif]

I had the same idea about adding some sort of heating element to my DIY Stir Plate.

https://www.youtube.com/watch?v=VW5bGJ1Bwfk

My first thought was to use something like my coffee cup warmer:
View attachment 357636
It did get over 120 d F but took a long time.

Then I thought about a hot plate from an old coffee maker:
View attachment 357638

1300 watts at 120 vac should do the job. Lots of neat parts to salvage too!

However, I'm already using 12 volts DC to power my mag mixer (old computer fan + PWM control + 12 VDC wall wart), and I didn't really want to have high voltage AC to mess with.

Started looking at low voltage heating foil, and specifically at the heating pads used in handlebar grip warmers. The right size, plenty warm, operates from 12 volt DC power and easy to control.

That's when I found this:
View attachment 357639

From this website:
http://www.adafruit.com/products/1481

The specs are pretty impressive, operated from 5 - 12 vdc, thin and flexable, and very inexpensive! So I ordered 2 of these, and a couple MOSFETS. Likely put together a simple 555 timer PWM circuit for control.

They aren't here yet, but I hope to have some time to in the next couple of weeks to at least experiment with these and see what they are capable of.

I'd like to hear what others might have found for low voltage heating elements that could work for a heated bed.

Thats actually a really good idea... Should have thought of that! ... Maybe ill use the same approach if my friend wants one some day


__________________________
Hades 0,9 aqua/0,3 hades dripper
Hades 1,1 russian/0,4 stiletto
M16 helio 0,29
Galileo aqua 0,8
Bolt carto tank
Vamo vivi/protank
Kts+ igo-w 0,7

 

[rowdyplace]

I had the same idea about adding some sort of heating element to my DIY Stir Plate.

<<snip>>

My first thought was to use something like my coffee cup warmer:
<<snip>>

Then I thought about a hot plate from an old coffee maker:
<<snip>>

1300 watts at 120 vac should do the job. Lots of neat parts to salvage too!

However, I'm already using 12 volts DC to power my mag mixer (old computer fan + PWM control + 12 VDC wall wart), and I didn't really want to have high voltage AC to mess with.

Started looking at low voltage heating foil, and specifically at the heating pads used in handlebar grip warmers. The right size, plenty warm, operates from 12 volt DC power and easy to control.

That's when I found this:
<<snip>>

From this website:
http://www.adafruit.com/products/1481

You are a genius!! I award you the:

​

I like these heaters. I am going to order a couple next week.

I started steeping with a crockpot. Upgraded to the Harbor Freight large Ultrasonic Cleaner. My son is a chemist and pointed out that insuring a good "mixing" of the ingredients before steeping would aid the process. He brought me an old Mag Spinner Table home from his work. It is excellent - but, it is roughly 18 inches wide/tall/deep, and way too heavy. It was also dirty as He77 since he works around coal processing. Every time I turned it on, I got black dust everywhere... So, off to Google.

I never considered adding heat to the spinner table until I had one working. I too looked at the coffee pot, and, like you, did not like the 120 volts ac required. I also have 3 of the Mr. Coffee coffee cup warmers from a local thrift store ($1.00 each) I considered. Again, too high of a power requirement for my likes.

I first used a PWM to control the motor speed. It whined too loudly for me so I found this - DC AC to DC LM317 Power Continuous Adjustable Voltage Regulator 1 25V 37V USA | eBay USA shipper and around 5 bucks. Also, it accepts either AC or DC as the input voltage.

Your idea is absolutely perfect. The device is stainless steel so nothing to worry about interfering with the magnetic field. The power requirement is excellent.

I look forward to sharing some more notes with you soon.

 

[rowdyplace]

As promised, here are 2 pics of my second unit. Please excuse the excessive hot glue. I was getting this ready to ship to California. (No points for neatness.)

​

Not really much to it. Wooden box, PC fan, eBay speed controller, power switch, power lamp. All for about $6.00.

 

[Dusif]

Looks really good even with all the hotglue


__________________________
Hades 0,9 aqua/0,3 hades dripper
Hades 1,1 russian/0,4 stiletto
M16 helio 0,29
Galileo aqua 0,8
Bolt carto tank
Vamo vivi/protank
Kts+ igo-w 0,7