Edge Detection in FPGA using Sobel Operator
Edge Detection in FPGA using Sobel Operator

74LS641 Transciever Interface Circuit

Interface Circuit FPGA


IC1 � 74LS641
IC2 � 74LS641
IC3 � 74LS33
C1 � DB25 connector
R � 2.2K?
74LS641 is an octal transciever for converting 5 to 3.3v and back.
74LS33 is a 3.3 Voltage Regulator.
DB25 is the parallel port male connector to attach to the Parallel Port.
2.2k Resistors are pull up resistors.

Tags: PC Interface , Circuit , 74LS641 , 74LS33 , DB25 ,
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