It’s more Modification than project, but it can live here for now.
It was just a Short and simple mod to a Dual frequency fob.
I De-soldered gen1a chip from antenna, and soldered on gen2 chip and a little dab of hot glue just to hold everything inplace.
Now I can use it for practice writes before writing to my FlexM1gen2
My Reasoning - if you care
Basically, I always carry a T5577 card in my phone case, and in my backpack I carry a Mifare Magic 1k card. (gen2)
I also carry a dual frequency fob. (T5577 and MF1k gen1a)
I know more people use gen1a rather than gen2, but I have a FlexM1 gen2 implant (I like it for the convenience of being able to write to it with my cellphone without having to carry around a ProxMark3 and laptop)
I also want to minimise the chance of bricking it with my phone, hence carrying a gen2 card to test on first before writing to my FlexM1.
Now I can use my fob instead which is a closer analog in performance.
I opened up the fob, and saw both chips were epoxyed onto the surface.
There were a couple of approaches, but I went for quick and crude
And it works
The End