How to make a RFID bracelet for a travel card (Oyster card)? Answered
Im trying to make a bracelet which incorporates my London Oyster Card (RFID travel card) so i can just swipe my wrist and not faff about with wallets or pockets etc but I am having a few issues.
The basic design is going to be simple and effective. I will have a length of regular guage wire around the wrist, secured by a single wire connector/ terminal block (see photo). It will prob be a earth wire, as it is a fancy colour. The RFID will be placed inside the plastic connector and hot glued end end to secure it and keep out the elements. The RFID's aeriel wire will be inside the earth wire heatshrink, it will be a loop of wire and can be as thick as it needs to be.
I keep having problems though, I cant get the chip out of the card in one piece. I have been using nail varnish remover but with mixed results.
When/if I do get the RFID chip out of the card, i will need to solder a new aerial and I am unsure about the process. Does the length/gauge of wire matter for the function of the RFID? im thinking about its frequency. Will it need to be ceramic covered wire to avoid shorts?
Has anyone put a contactless travel card into other things? Or has any experience dealing with this sort of area? I would very much appreciate any help or advice.