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tutorial on building a counter for a RFID device

jtiernan2008
jtiernan2008 asked
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Last Modified: 2012-05-06
I got advise from an expert as follows;

You  can make a 300 MHz counter with a CPLD (a programmable logic device) that costs ~$20.
    The counter (18-bits) would run continuously.  
    The transmitter pings every millisecond.  
    Each receiver would generate one COUNT reading per ping.  
   The computer would take all the COUNT readings and crunch them to calculate the transmitter position.

https://www.experts-exchange.com/Other/Math_Science/Q_24190697.html#a23776425 

Does anyone know of any text books or online tutorials that may assist in building this. Also would I be able to use a RS-232 to USB adaptor for this device as my laptop has only USB ports.

thanks
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