I redesign it to make it simpler to use. Also it is more stable that 2nd version.
You can use it however you want. You can blend your tea or coffee, and because it's also portable you can take it wherever you go.
It is lighter and the only thing you need to make it works is a 9V battery.
You can also use it in your chemistry lab.
I hope you'll like it!
Step 1: Materials
- 3x2 cm perf-board
- a LM317 Terminal Adjustable Regulator (recycled)
- wire (preferably colored)
- 1 red LED (preferably super bright)
- a 5KΩ potentiometer
- 1KΩ resistors (recycled)
- a 240Ω resistor(recycled)
- a 10µF polarized capacitor (recycled)
- a 0.1(100n)µF capacitor (recycled)
- a panel mount 2.1mm DC barrel jack
- a CD-ROM(DVD-ROM/RW) geared motor (recycled)
- a 9V battery clip
- a 9V battery
- a 12V DC power supply with 2.1 mm jack
- a 1N4007 diode
- a CD case for 20 CDs (recycled)
- a black paint spray
- a round piece of steel
- a round piece of glass(bigger than the case's diameter) (recycled)
- shrink tube
- 40 cm of plastic hose (0.5-0.7 cm thick, preferably colored)(recycled)
- solder wire
- 4 x 3mm screws(recycled)
- 4 x screw nuts(for 3 mm screw)(recycled)
- 1 x 4mm screw
- 1 x 4mm screw nut
- a small cooling radiator(you can get it from the processor of a video card)
- easy slide pads
- 2 x round classic magnets(recycled)
- 5 x 3 mm thick round magnets(5 mm diameter)(recycled)
- Cutting tools
- A drill
Step 2: Paint the Case
Next clean the CD case and be sure that there aren't no more fats or dirt.
Design and paint the case. I choose the black color because it looks great.
After that, you may varnish your case in order not to "lose" the paint.
Step 3: Cut the Bottom of CD Case
After that, put the support of the geared motor on the middle "tower". If the 4 mm screw is too big, cut it.
Step 4: Make the Circuit
After that, you shouldn't touch the perfboard in order not to let your fingerprints on the perfboard.
Then you're free to start soldering the stable parts (the chip, the capacitors,..).
Mount the potentiometer, the LED and the DC barrel jack.
Next solder the mobile parts, I mean the wires.
Step 5: Mount the Magnets
Glue them with superglue in order not to "fly" when you're using the magnetic stirrer.
Mount the top of the CD case. The magnetic stirrer is almost done.
Step 6: Make the Chemicals Protector for the Case
After that, take three transparent easy slide pads and stick they on the glass so as it will be fixed, will not anymore be able to move.
Take the bigger tube, make a straight cut on it, fix it on the glass's edge, then stick the ends of it (the tube) with superglue.
This thing will protect your stirrer against chemicals's action.
Step 7: Make Your Own Stirring Bar
Varnish it in order not to rust.
Now you can use it as a stirring bar.