After I've published the first instructable about how to make a magnetic stirrer and after the constructive criticism I've got, I decided to make a new Magnetic Stirrer, an improved one.
Then I start the research for what materials should I use for it. I make the circuit, the design of the case and then I assembled it.
I hope you will like it, and by the way, you can also use it in many ways.
What did you make?
I made a Portable Magnetic Stirrer that can be used in the chemistry lab, home or everywhere you want yo use it. It is more efficient and it has more features than first version so as it would be a pleasure to use it. As I said above, it could be use in many way, not only as a magnetic stirrer.
How did you make it?
Making it wasn't very hard, but to make one you need patience and time, patience for possible errors that can appear during you make it, and time for work. I started searching for a case for it, not too small, not too big. Then I continued seeking for a geared motor, which is little and efficent. After I've got it, I search for a metal disc and some strong magnets. When I finished getting all things I need (you will find a materials list next step), I made the circuit, I chose a design for the case and I painted it.
Where did you make it?
I made it home and at school, during breaks.
What did you learn ?
By making this project, I learn that almost everything can be recycled and reused for other porposes, like my project. Almost everything piece of it was recycled. The geared motor is from an old CD-ROM, the case is a CDs case...It was a bit tricky to make it customisable, but not impossible. And it was a challenge for me to make the circuit as small I can.
Let's start the work.
Step 1: Materials needed
Materials needed for the circuit:
- 3x2 cm perf-board
- a LM317 Terminal Adjustable Regulator (recycled)
- wire (preferably colored)
- 4 LEDs (preferably super bright and colored)
- 4 female connectors
- a 5KΩ potentiometer
- 3 x 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
Other materials needed:
- a CDs case for 20 CDs (recycled)
- a black paint spray
- duct tape
- a round piece of steel
- a round piece of glass(bigger than the case's diameter)
- shrink tube
- 20 cm of filled transparent plastic tube(0.3 cm thick)(recycled)
- 40 cm of plastic hose (0.5-0.7 cm thick, preferably colored)(recycled)
- hot glue
- solder wire
- 8 x 3mm screws(recycled)(one screw with 2.5 cm height)
- 5 x screw nuts(for 3 mm screw)(recycled)
- a small cooling radiator(you can get it from the processor of a video card)
- easy slide pads
- 2 x HDD magnets(recycled)
- 5 x 3 mm thick round magnets(5 mm diameter)(recycled)
- Cutting tools
- Hot glue gun
- A drill