Hi,
   I don't know if anyone else has noticed this, but there's a full design for 
an RFID reader in the current issue of Elektor (September 2005). Only problem 
is, it needs a 13.56MHz fundamental-mode crystal - as far as I can tell, 
13.56MHz is not a standard frequency. Does anyone know where I might be able 
to get one of these crystals, or a 27.12MHz fundamental-mode crystal? TTL 
oscillators would also be fine...

   Failing that, can anyone suggest a way to generate a stable 13.56MHz square 
wave? Bonus points for cheapness and "junkbox buildability" (i.e. if it can be 
built out of stuff commonly found in a hobbyist's junk box)...

   The design in question is the "Experimental RFID Reader" by Martin Ossmann, 
Elektor September 2006, p.34-38.

Thanks.
-- 
Phil.                         | Kitsune: Acorn RiscPC SA202 64M+6G ViewFinder
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