hi everybody,
as i wrote somewhere in this forum, I’ve spend many times and a lot of money trying to develop a proper payment implantat.
doing this I’ve put this fingernail stickers together with a dissolved vimpay card. similar to the ones sold by iamrobot.
on my cellphone everything was working fine, lights card etc. but guess what on a payment terminal, it failed.
and to make sure that the leds are the reason I’ve build a copy of this vimpay chip without led stickers and with less led stickes.
so conclusion of my vimpay diy project: the same as Walletmor - don’t use any othe consumer together with your payment implant.
the reason is more simple than you may think, protect of mtm (men in the middle) and/or card scamming etc.
i. e. if you put a proxmark or something like a proxmark between your implant and the terminal some enegy goes to the proxmark and some to your implant. so, more power transfered. maybe to much, result: only use one card…
still don’t believe me?
get yourself the mastercard emv specification and the nfc payment tech specs from the web. I’ve read them for hours…
and buy yourself a nano vna or oscilloscope an measure the dB of power, with an without led or xled.
youtube will help.
and last but not least
keep in mind >
even a xLed don’t light up only with love… 
attached some pictures of my ideas, test and fails.
- my hand with diy implant infected
- Walletmor and xled together - plan
- vimpay dissolved
- vimpay with 2 led
- vimpay with 4 led in biosilicone
