Something does not seem right, first of all if you see the specs it puts out a lot for it's size but loud.. anyways the red and black wire should be power but nothing happens. Now if I connect the black and yellow wire the rotor moves but wont move unless I manually push it but it's not spinning at 13K rpms.
The yellow wire as you know is rpm, so I assume the fan is trash? my input was 12 V it sucks because I used it very little -- It's NOT Ni-kon It's NE-KON!
The thing is as I said I had this fan for two years and when I connected it before I used the red and yellow for (+) and black for (-) and the fan ran at 13,000 rpms.. I'm lucky enough to get 600 rpms out of it..
It's a ball bearing fan so that might have some kind of effect to it.
last time I used it was 2 years ago with it screwed into a heatsink to cool off a led I was testing, that was the last time I used it between then and now.
Hmm could be, I know it has a locked rotor detector and sometimes it will just sit trying to spin every few seconds, it puts out good air.. I might try and just open it.. at least the prices are lower then when I first got it.
Any tips on getting a nice round hole in plastic? I was going to make this again but just thinking about it the IRF510 Is a mosfet but I'm pretty sure I can put the LM2940T in front to lower the voltage and the IRF510 after to the fan right? I'd need two heatsinks, no?
Last time I did this looong time ago something crazy must of happened the trim pot I had (radio shack) 15 turn burned up on me pretty badly.. Not sure what happened as it was working fine then a few more turns to set and the magic smoke was out of the NTC thermistor.
Because I know that circuit is really nothing but a variable resistor but I don't want any crazy spikes and not a repeat of what happened last time. -- It's NOT Ni-kon It's NE-KON!
Yeah but I was turning it clockwise.. which I would assume would be increasing the resistance (fan was slowing down) but then as I reached the end of the 10K pot the NTC just started to glow and that was the end of that..
If I turned it CCW then it would of always been at full speed.. So I was asking if I added a resistor to the pot I can get a better range so the fan would cut off if the fan was blowing at the NTC? -- It's NOT Ni-kon It's NE-KON!