I have also built my own POE board like that. My cost was around $75 in parts and spare time over 3 days. We do not have enough need to do the integrated switch but did look into sourcing some hardened switches and modifying them.
On Wed, Mar 17, 2010 at 7:44 AM, <cc...@dot11net.com> wrote: > They are Leviton and they work fine for our applications, but I'm looking > forward to not having to have the pigtails and being able to plug and > unplug directly. > > Cameron > >> Cool. Those look like Home Depot ethernet jacks you're using to attach to >> the pigtails. How are they working out for you? >> >> Greg >> >> On Mar 16, 2010, at 5:31 PM, cc...@dot11net.com wrote: >> >>> Greg, >>> >>> We build one of these for internal use (posted about it last week), but >>> ours is a passive device that needs an external switch. We use it in >>> combination with a 493 or 493ah on tower tops. It takes any input >>> voltage >>> from 18-96 volts and outputs the same input voltage on 9 ports with two >>> of >>> the ports switchable between the input voltage and 12 V. Why only two >>> ports? Well, to make it cheap enough, the voltage convertor we use only >>> outputs about 1 amp so running more than 2 devices would probably not >>> work. The voltage convertors we use are about $40 each so putting one on >>> each jack would make the device pretty expensive. I'm sure we could >>> design >>> a power supply that would do everything we want, but since we aren't in >>> the electronics mfg. business, it would be more costly that it is worth >>> to >>> us. >>> >>> With our next run, we will be making the board look a little different >>> with two rows of ethernet jacks on the front of the board facing out >>> instead of up/down. We find that getting the cables out of the jacks in >>> the current config can be a PITA (hence the pigtails in the pics). The >>> devices are about $150 in parts as they stand to make in small >>> quanitites. >>> I posted last week about it because I wanted to see if I could use some >>> simple ICs to detect ethernet signal to trip a power relay to make a >>> remote power cycle by disabling the ethernet port. Further research >>> shows >>> this is not possible without a PHY chip. I'll try to post a pic of one >>> of >>> our tower top boxes, but if it doesn't make it and you want to see it, >>> hit >>> me offlist. If you think it would be a big seller and you want to make >>> an >>> investment, I'm sure we could come to an agreement ;). >>> >>> Cameron >>> >>>> Does anyone know of or use a POE powered POE splitter/switch combo >>>> which >>>> could be tower mounted which would allow a single ethernet cable >>>> carrying >>>> POE (perferrably 48v) up the tower, and then would pass POE >>>> (adjustable >>>> voltages) to multiple devices and also act as a switch (preferably >>>> managed)? I'm thinking of something that would let a person run a >>>> single >>>> Ethernet up the tower and then connect multiple POE powered devices. It >>>> seems like this is something that would be a big hit. Yes, I Googled it >>>> first. >>>> >>>> Greg >>>> >>>> >>>> -------------------------------------------------------------------------------- >>>> WISPA Wants You! Join today! >>>> http://signup.wispa.org/ >>>> -------------------------------------------------------------------------------- >>>> >>>> WISPA Wireless List: wireless@wispa.org >>>> >>>> Subscribe/Unsubscribe: >>>> http://lists.wispa.org/mailman/listinfo/wireless >>>> >>>> Archives: http://lists.wispa.org/pipermail/wireless/ >>>> >>> <POE_and_RB493.jpg><IMAGE_208.jpg> >>> >>> -------------------------------------------------------------------------------- >>> WISPA Wants You! Join today! >>> http://signup.wispa.org/ >>> -------------------------------------------------------------------------------- >>> >>> WISPA Wireless List: wireless@wispa.org >>> >>> Subscribe/Unsubscribe: >>> http://lists.wispa.org/mailman/listinfo/wireless >>> >>> Archives: http://lists.wispa.org/pipermail/wireless/ >> >> >> >> -------------------------------------------------------------------------------- >> WISPA Wants You! Join today! >> http://signup.wispa.org/ >> -------------------------------------------------------------------------------- >> >> WISPA Wireless List: wireless@wispa.org >> >> Subscribe/Unsubscribe: >> http://lists.wispa.org/mailman/listinfo/wireless >> >> Archives: http://lists.wispa.org/pipermail/wireless/ >> > > > > > -------------------------------------------------------------------------------- > WISPA Wants You! Join today! > http://signup.wispa.org/ > -------------------------------------------------------------------------------- > > WISPA Wireless List: wireless@wispa.org > > Subscribe/Unsubscribe: > http://lists.wispa.org/mailman/listinfo/wireless > > Archives: http://lists.wispa.org/pipermail/wireless/ > -------------------------------------------------------------------------------- WISPA Wants You! Join today! http://signup.wispa.org/ -------------------------------------------------------------------------------- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
