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shift register

Idea for shift register circuits?

So, I've recently mastered the use of shift registers and have a handful of them laying around.(74HC595's)

Any project Idea about what I might build with them?(possibly something out of track)?

What I mean by this is not knight riders or led cube circuits, rather some whacky ideas - even abstracts will do.

Possibly some fancy circuit you have in mind?

I am not asking for schematics, just running low on inspiration..Any ideas??

Oh and I don't mind using my arduino along with it(As it is what I have!)

My 8x16 led matrix

UPDATE:  6 Oct, 2013

Ok, I have been too lazy to update this as this was done a month or so ago. I hereby declare this project complete. It is now bigger and better! Below are some photos and a video of the completed matrix and driver board(click any picture for a larger view)-

The Matrix-

The driver board (front) -

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74hc595 with 7 segment dispaly not working right

For some reason I can't get my 7 segment dispaly and 74hc595 shift register to work right on my arduino.  I can get the segment to turn on one at a time.  When I try to do numbers it just doesn't work right?  I have clock pin, and data pin to the the arduino. It will try to light up my numbers but will be missing some segments. It will also skip numbers completely for example try to show 1, 4, and 6 and skip the rest. I tried putting a 0.1 cap on the latch also.  I have 220 resister running from each pin of the display to the shift register.  Here my code: