27 Jun
2012
27 Jun
'12
4:42 a.m.
So in laymans terms you vary the speed by narrowing or widening the pulses delivered on
the positive lead (duty cycle). A steady 12vdc and you get max air flow/speed? The tach
lead is registered by something on the mobo, and otherwise has nothing to do with the
rotation of the blades?
------------------------------
On Tue, Jun 26, 2012 8:42 PM PDT Dave McGuire wrote:
On 06/26/2012 11:27 PM, Chris Tofu wrote:
black and red leads are labeled, white is not.
Speed control? From
large Sun servers OOPS! Sorry. But can someone inform regardless, and
what kind of signal/circuit is required to control the speed, if
thats the case. Cant successfully look it up now, its this stupid
phone.
Put them BACK in the large Sun servers if they're anything remotely
recent.
It's almost definitely a tachometer lead. They're typically
controlled via PWM, with a closed-loop servo for speed control and
OS-accessible speed monitoring.
-Dave
--
Dave McGuire, AK4HZ
New Kensington, PA