i know it's kind of a dumb question, but i lived in a stone age
so here we go...
i already purchased 12cmx12cm PC fan 12v rated at 3A and also DC adaptor rated at 3A
do i need to look for a certain potentio(rheostat)??
is using 10kΩ or 50kΩ is allright? or do i need to find the lower Ω?
and also what spec i need to look out for the potentio(rheostat)?
do i need the one that handle 3A or any potentio(rheostat) will do?
do i need to install some fuse, resistor or capacitor?
(know nothing about how to install them)
and the magnet, is it need to be spaced or can i just put 2 pcs of 50mmx3mm round magnet and glued them side by side with no space in the middle?
because here's the think, i would like to be able to use my 30ml boittle on this magnetic stirrer, and for that i need 20mmx8mm spinbar
i'm affraid if i put space between those 2 magnets, then my 20mm spin bar won't spin?