gsawdy;310441 Wrote: > > Hi Sean, Thank you for the reply. Actually I thought I was using POE, > just DIY by intecepting the the CAT 5 and using the last 10 feet or so > to send the power to the SB3.
No that's not proper POE. POE devices (802.3af) send a high voltage from the switch which is then regulated at the point load. http://en.wikipedia.org/wiki/Power_over_Ethernet > Do you know if the Linksys device is passive--I assumed so but perhaps > it isn't???? It's not passive, it's essentially a DC->DC power supply. > The Acopian power supplies are very tightly regulated. It doesn't matter. You will not have a regulated supply any more if you put a big resistor (eg long cable) between the power supply and the device. You could easily lose one volt, which would be enough for SB3 to not operate. > I can wire it so that there are exactly 5v at the point where I feed the > CAT5 which will take care of any voltage losses from the basement to > that point. Actually you can't. The voltage drop is dependent on the power being drawn at a given instant, so it's not even a fixed voltage that you end up with. > Now if your POE device is active then my plans won't work and I would > need to purchase them but how do they prevent voltage loss and still > deliver a regulated output? Because the regulator is placed at the point of load. You will get 5V output regardless of load or cable length. It doesn't matter if the cable delivers 10V or 43.8V, the output is always 5V. -- seanadams ------------------------------------------------------------------------ seanadams's Profile: http://forums.slimdevices.com/member.php?userid=3 View this thread: http://forums.slimdevices.com/showthread.php?t=48668 _______________________________________________ discuss mailing list [email protected] http://lists.slimdevices.com/lists/listinfo/discuss
