I had a fumble around months ago but none seemed to do anything useful. On the input if I remember rightly looked like power lines
When I get around to it I’mma draw up a schematic.
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Thanks for the reply, I had just put it on my list,
That was the quickest ticked off project ever.
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Schematic sounds great, I will put it in our Wiring diagram repository whenever you are done 
I did find the German website quite a while ago, but the last time I searched for it, I came up dry.
Pretty sure there was no schematics on there, I was looking for the max switching current info.
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I found a polish site where a guy is asking a question about his car. I had done a google lens search or I never would have found it but the board he shows has different shorts than ours I am really curious to know what this board was built for in the first place it seems to me with all of the people we have on this site we should be able to find a better way to do things then mod a board to get things to work for us it just seems unreliable to me.
https://citroen.org.pl/forum/viewtopic.php?t=7935
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In that case you would be horrified if you start looking inside a large number of products 
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its in my first post, it is an imobiliser made by a German company. Due to it being a serurity device that was factory fitted to some cars information is kept scarce. I did find the FCC report on it though.
Aint that the truth
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Yes and No,
I personally think the xAC is a great product, great price and the antenna is excellent for xSeries implants.
The Mod That @Devilclarke is working on ( Toggleator ) is a very elegant and simple add on solution.
Also I believe his longer term plan? is to possibly / maybe come up with an all encompassing design in conjunction with DT and I assume @TomHarkness for antenna design?
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Lol no I know the requirements for class 1 i.e. most consumer electronics and you are absolutely right if you take a look at those boards they are crazy.
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HAHA i did, anyway that would be what i would like to do yes.
looking at the FCC info this was filed in 1996, its a good chance that the “off the shelf” device (prior to conversion to xAC) is a new old stock potentially obsolete but 1000’s still exist in a warehouse.
EDIT: HRH Vertriebs GmbH the company that makes them no longer appears to exits (no longer registered as a company in Germany)
EDIT 2: company address is now owned by DRUCKEREI ZEIDLER GMBH & CO. KG a printers so even more cause to say the devices are New old stock
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Ya I noticed that after I posted and still had no idea what you were taking about. Had to do some searching and figured it out. Lol thanks.
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Maybe they are all in the Dangerous Things Warehouse…
So here is the plan, Let’s buy all the xACs so that you can make us the xAC V2… I would make a great businessman, that plan is flawless
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No you are right after I thought about it. A custom made product would cost more, why pay the extra price when we have something that already works.
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Great sleuthing
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Thats the point, it “works” hence the mods and using what we have. There are 2 issues though;
- The stock will eventually run out.
- Only works with EM41 & 42 ID’S
To elaborate on point 2, the xEM is a T5557 chip that can replicate many different ID standards. The problem is if I have my xEM setup to unlock a door at work (HID) then I can’t use it for the xAC.
The ultimate goal is to have a universal LF rfid access controller that is tuned to work with implants.
Love it!!
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I think you mean “unobtainable” not “ultimate” 
Why would it be unobtainable? I see no reason if we design it.
125kHz modulated carrier should be easy to decode?
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Well you did not state LF RFID not even the PM3 is a universal RFID reader.
It might be possible to make a reader that works with at least most of the things a t5577 can emulate.
Personally I would prefer a HF and LF reader that works with the more common standards.
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My apologies i did not (fixed now).
what i am envisioning is essentially a cut down proxmark3 v2 no emulation or anything the whole analog front end design is basically there so should’t be massively hard.
something I’ve learnt is, you never say things like that “out loud”
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