"A" 74HC595 is not enough for a 5x5 grid, you need 10 control pins, and that only gives you 8.
Spend $1.25 at taydaelectronics.com and get a MAX7219, a 30K trimpot, a piece of prototyping board, and 2x20 pin headers and start building.Will end up with something way more secure & reliable than trying to do it on breadboard. LEDs too if you need them.Order today, will have parts in your hand in a couple of days.
Spend $1.25 at taydaelectronics.com and get a MAX7219
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