Whitey70
Active Member
Ok, so I dont have much of a clue about electrical wiring, I wanted to build a stirplate, read a few threads on here & on the internet.
Amazaingly I got it to work......sort of.
Heres the break down.
120mm 12vdc .35A brushless cpu fan
Cell charger (writing is so small I cany make out anything about it) for smart phone
10,000 ohm potentiometer
Project enclosure
HDD magnets (harvested from 3HDD)
At first, connect black to black & red to red between charger and fan. Fan spun, but not execisivley fast imo. Generated plenty of air movement, but didnt seem to have balls.
Then connect all to the pot, after some fiddling figured out how to get it to work.
Put one magnet on fan, it attached, figured Id play with it before gluing it.
Mounted to lid of enclosure with small rubber grommits (+- 1/8") between lid and fan, plenty of room to spin free.
Put lid onto enclosure, dropped 1" stirbar in 1000ml flask fill of water, it centered on magnet, turned pot gradually up, started to spin. I could see from the get go that there wasnt enough momentum. After 1 min there was a very small vortex forming, but nothing more. Figured Id try a 2000ml flask.....nothing, did start to smell burning plastic tho.
So which component(s) are all wrong?
Any advice would be appreciated.
TIA
Amazaingly I got it to work......sort of.
Heres the break down.
120mm 12vdc .35A brushless cpu fan
Cell charger (writing is so small I cany make out anything about it) for smart phone
10,000 ohm potentiometer
Project enclosure
HDD magnets (harvested from 3HDD)
At first, connect black to black & red to red between charger and fan. Fan spun, but not execisivley fast imo. Generated plenty of air movement, but didnt seem to have balls.
Then connect all to the pot, after some fiddling figured out how to get it to work.
Put one magnet on fan, it attached, figured Id play with it before gluing it.
Mounted to lid of enclosure with small rubber grommits (+- 1/8") between lid and fan, plenty of room to spin free.
Put lid onto enclosure, dropped 1" stirbar in 1000ml flask fill of water, it centered on magnet, turned pot gradually up, started to spin. I could see from the get go that there wasnt enough momentum. After 1 min there was a very small vortex forming, but nothing more. Figured Id try a 2000ml flask.....nothing, did start to smell burning plastic tho.
So which component(s) are all wrong?
Any advice would be appreciated.
TIA