AW: Re: [sdiy] My first big project

[Ullrich Peter]

>With a series of 74HC595/597 you can have unlimited number of inputs an outputs
for LEDs, 
>buttons etc, anything not too critical on timing. HC595 is paralel out/serial
in, and HC597 is >serial out, paralel in (or was it the other way? correct me if
I'm wrong). They are so much 
>alike, you can almost interchange. Connect them all in ring daisy chain, with
just 2 jumpers 
>configure PCB to accept 595 or 597, and you're done - controlling unlimited
number of I/O with 
>just 4 uC pins: serial clock, latch, data in, data out.

This method is also very common in BasicStamp2 Projects. Even character
LCD-display
can be connected this way!

Ciao
Peter

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