74LS641 Transciever Interface Circuit
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 ,