10 Apr
2007
10 Apr
'07
10:16 p.m.
Spencer Russell wrote:
On 4/10/07, Robin Gareus <robin(a)gareus.org>
wrote:
There are different kind of "power classes" for IEEE-1394.
1394 requires the devices to regulate their own voltage.
The minimum voltage is 8V! 9.25V recommended. it can be as high as 30V.
and should not exceed a current of 1.5A... - The PCI-firewire in my
desktop just forwards the 12 Volts from the ATX power supply.. -> bug
someone with a Mac & Voltmeter ;)
Many firewire devices will work just fine with +5V -
phantom-powered preamps might pose some kind of a problem..
#robin
Spencer Russell wrote:
I thought about that, but according to [1], Firewire supplies 30V! Can
anyone confirm this? USB only provides 5V, so it would take more than
just an adapter to step up the voltage. Hrm, this is problematic. I'd just about
settled down to the idea of
either the Presonus Firepod of the Edirol FA-66, but if there's no way
to get them portable power,
you could get or build an adapter. USB-power + 4pin 1394 to 6pin 1394.