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|kbn| · 03-10-2004, 12:16 PM

I just tested at 9v, well t was about 9v anyway - I didnt bother with capacitors when I made the circuit ages ago, which may have limted the available current for the fan.

Startup was measured at 0.42A, while runing was measured at 0.12A.
At this voltage it is inaudable and shifts a resonably large amount of air, less than at 12v though. I may try to get 10 or 11v later.

Any one here know what type of motors DC ones are? I assume the stator is a permanent magnet while the rotor is wound and has brushes?
How can I control the speed better? like running from 12v but with a resistance to give 10 or 11v which resistor would be best?

03-10-2004, 12:16 PM	#25
\|kbn\| Cooling Savant Join Date: Feb 2004 Location: W. Sussex, UK Posts: 329	I just tested at 9v, well t was about 9v anyway - I didnt bother with capacitors when I made the circuit ages ago, which may have limted the available current for the fan. Startup was measured at 0.42A, while runing was measured at 0.12A. At this voltage it is inaudable and shifts a resonably large amount of air, less than at 12v though. I may try to get 10 or 11v later. Any one here know what type of motors DC ones are? I assume the stator is a permanent magnet while the rotor is wound and has brushes? How can I control the speed better? like running from 12v but with a resistance to give 10 or 11v which resistor would be best? Last edited by \|kbn\|; 03-10-2004 at 01:13 PM.