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day3: build test object

Well, now it is time to build an object in which I can test the whole design.
2 7476 IC's (4 FF's) will recieve signals from the parallel port. (they are buffered with the 7407 of course)
If they receive a signal, they should switch from state and stay in that state, (i.e. if it's off, after a puls it should go on and stay on no matter how long that puls takes).
the outputs of the FF's are connected to a LED and to a buffer. those buffers shoulb be connected to the inputs of the parallel port.

7476 pinout and function table


schematic:


picture of the test object


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day3: build test object