POE Touchscreen Endeavor

[pete_c]

I've been playing with these little capacitance Atom based Touchscreens. They are little miniature marvels now running Linux, Android or XP. So my next steps are related to getting these to work maybe with some sort of POE style connection; maybe via a power injector of sorts.

The currently included 5VDC power supply is rated at 4 AMPs. The draw though is:

1.24A/6.2W during startup
1.09A/5.4W with the clock on screen set at lowest brightness
1.40A/7.0W with the clock on screen set at Highest brightness
0.14A/0.7W in STANDBY set by performing a SYSRQ+O

I have events now which dim, brighten and shut off display; but I do not take the device into standby mode testing it with Windows XP/mini-2003 setup.

Found an online POE calculator and passive POE injectors.

Any suggestions relating to best means of doing POE.

 

[pete_c]

Tried this morning using the D-Link DWL-P200 POE. It runs with 48V and passes 12VDC 1 AMP or 5VDC 2.5 amps at the distal end of the wire. Bench testing it with a 20 foot Cat5E cable and it works fine. Next test will be a 75 foot (or close) to the master bedroom touchscreen.

I noticed that the D-Link power splitter is getting a bit warm. I've had one burn up on me. This morning ordered a TP Link and a Laird PoE 5VDC splitter. While in this mode also ordered a Cisco PoE switch. (already had like 6 48 V injectors set up).

 

[wuench]

Do you have a link to the touchscreens you are playing with?

 

[pete_c]

Here's a wiki for the Joggler.


http://jogglerwiki.info/

 

[pete_c]

I left the D-Link DWL-P200 PoE adapter on all day connecting the Joggler power.

It is a 48V DC 400ma to 5V DC 2.5 AMP/ PoE adapter.

It did get pretty warm (almost hot). I have had one "burn" up connecting it to a Linksys WRT-54GL (with DD-WRT on it) a couple of years back.

That said I purchased two brands of PoE power splitters which follow the "IEEE 802.3af standard"; so will be connecting these to the Cisco PoE switch.

One is a TP-Link PoE splitter model TL-PoE10 (which interestingly I found for $13.98 this morning)- cheaper than the $24 I paid.

The PoE Splitter fully complies with IEEE 802.3af standard, and can work with all IEEE 802.3af PoE compliant PSE (Power Source
Equipment) or PoE Injector, such as TP-LINK’s TL-SF1008P or TL-POE150S, to deliver 12V, 9V or 5V Direct Current to the
device which do not support PoE.

and the other one is a Laird PoE 5VDC splitter.(POE-48I5S-AFI) which I found for $24.

The prices were all over the place from about $20-100. I purchased both of these for around $24 each.[/indent]

 

[pete_c]

Testing both splitters with an Airlink SW408POE 100Mb switch. It has 8 ports and 4 are PoE. It comes with a .8AMP 48VDC transformer and works well with the two mentioned power splitters above. It sells for $40 USD. This one seems to be made for VOIP type telephone power supplies.

I decided to continue to utilize the TP-Link PoE splitters as they are more "modular" and smaller than teh Laird PoE 5VDC splitter. Ordered 3 more of the TP-Link splitters.

I also ordered and received a Tycon Power PoE switch. Very nicely built and it supports four 2.5 AMP PoE connections. It came with a 1.4 AMP 48VDC power brick. This one sells for $179 USD with no power brick. This one seems to be built for Access Point Powe supplies.

So far two of the Jogglers are doing well with no power issues that I can tell. Next week setting up 2 more Jogglers with PoE.

 

[pete_c]

A quick note regarding the Joggler.

A few weeks back a BIOS guru started to compile a new 16bit X86 BIOS for the Joggler called Seabios.

http://www.seabios.org/SeaBIOS

This new bios works with an internally mounted SSD PATA connection inside of the Joggler.

The above noted I am currently testing the preview version of Windows 8 on the Joggler and it is working well.

Relating to the POE endeavor I purchased a Tycon midspan 24 port injector. Works well.

http://tyconpower.com/products/TP-MS.htm

 

[etc6849]

Any pictures? The Joggler looks like a great table top touch screen for HA, are they still being made?

 

[pete_c]

I will post some pictures. I am adding the PATA port update to my Jogglers. Testing today with two Jogglers connected via a POE connection running XP and HSTouch. I have three Jogglers in the master bedroom. (I have 10 now sprinkled around the house).

They do have a nice small footprint. One is the bedside XP touchscreen, two are used mostly as a squeezebox clients (in linux); one connected via the NIC card and the other wireless.

They are not being made any more; but you can buy them refurbished.