RFID Interference

Danger Phoenix · 30 May 2010 at 23:01

I have my Oyster card and David Lloyd gym pass in my wallet and have noticed that my Oyster does not work when I touch the whole wallet on the scanner if the gym card is in there. However the gym card works fine with the scanners at the gym when the Oyster card is in my wallet.

I am guessing the two cards are interfering with each other?

GhostlyPea · 30 May 2010 at 23:10

I'll ask our support company what type of cards they are on Tuesday if you want as I'm not sure myself. I guess you have one of the "touch" ones don't you?

- Pea0n

jack.mitchell · 30 May 2010 at 23:15

Maybe the gym card puts out the stronger signal and overpowers the oyster card?

PermaBanned · 30 May 2010 at 23:17

jack.mitchell said:
Maybe the gym card puts out the stronger signal and overpowers the oyster card?

They don't put out signals do they?

Danger Phoenix · 30 May 2010 at 23:19

Pea0n said:
I'll ask our support company what type of cards they are on Tuesday if you want as I'm not sure myself. I guess you have one of the "touch" ones don't you?

- Pea0n

Is that Oyster or David Lloyd?

Touch ones? I didn't know there were different types :confused:

GhostlyPea · 30 May 2010 at 23:21

Danger Phoenix said:
Is that Oyster or David Lloyd?

Touch ones? I didn't know there were different types

David Lloyd. I don't have much to do with the gates/swipe system but I can ask around if you really want. I think some of our sites have swipe, some have touch-pads but I can't remember at the moment

- Pea0n

jack.mitchell · 30 May 2010 at 23:21

I don't think they actually put out signals but they work on frequencies right, which are generated by coils or something similar, so whichever had the most 'turns' would be the stronger card or am I talking 1950's here

Danger Phoenix · 30 May 2010 at 23:24

Pea0n said:
David Lloyd. I don't have much to do with the gates/swipe system but I can ask around if you really want. I think some of our sites have swipe, some have touch-pads but I can't remember at the moment

- Pea0n

The David Lloyd in Kingston uses touch. It would be great if you could ask please. I'm not really looking for a solution, but just curious as to why it stops the Oyster working.

GhostlyPea · 30 May 2010 at 23:25

Yeah no probs, I'll find out Tuesday when I'm back in the office (Bank Holiday, w00t!)

- Pea0n

Heliospherez · 30 May 2010 at 23:29

Yes - you are talking 1950's

The oyster receiver is probably far less sensitive. Or the receiver for the gym card is probably masked by the oyster card - the rings are usually made of an alloy that is dense and magnetic - this alone would prevent the receiver "seeeing" your other card.

jack.mitchell · 30 May 2010 at 23:34

PASONIX said:
Yes - you are talking 1950's

The oyster receiver is probably far less sensitive. Or the receiver for the gym card is probably masked by the oyster card - the rings are usually made of an alloy that is dense and magnetic - this alone would prevent the receiver "seeeing" your other card.

Ahhh com'on! I was almost getting there with the magnetism and masking :rolleyes:

At least I'm studying Embedded Systems and not Comms