Except by doing physical projects, how can I make learning digital electronics fun?

[oslon]

I'm studying for some competitive examination after graduating with computer engineering. The problem is I am already on a job unrelated to electronics and I find it very boring to learn this stuff again as everything is just feeling repeated and rehashed. I am not learning anything new. It's like revising.

How do I make this a bit more interesting? I really don't have time for physical breadboard projects. Are there any time less things that I can do to make this learning interesting, it necessarily doesn't have to some project only. Any challenging exercises that can tease my brain can also help me.

[HarryA]

Why not read books that interest you? For example:: Digital Design and Computer Architecture