How to make a 3D Printed Magnetic Stirrer

just a small portable and powerful magnetic stirrer made with a motor salvaged from an old dvd driver. can be used for beer making, stirring mushroom cultures,...

Costs around 2-3 USD if you already have the motor, the battery and some magnets laying around (motor and magnets can be salvaged form an old dvd driver).

Components:
3D printed parts (not available yet the models still need a little bit of work)
3.7V battery
tp4056
MT3608
1 k ohm or less potentiometer (I used a 10k ohm just because it was the only one I had. don't use that or you'll have trouble controlling the speed of the motor)
switch
2 magnets (width: 6 mm, length: 15 mm height: 3mm)