Is that the power line of a credit card reader?

Also in this forum you have started another thread
about "PicBasic text compress routine".
The format of the data is similar to the TRACK 2 of a credit card.

Thread about "PicBasic text compress routine"
http://www.picbasic.co.uk/forum/showthread.php?t=2813

I hope I am wrong.

Luciano