looking at the stuff you have made, I saw that you have made a lot but not many or maybe none (I didn't look that closely) of electronics. Maybe you could make a calculator or something along that line because you certainly have made a lot of other stuff.

I can teach you how to make a calculator petrol! You are a member of PTT.

If you want to learn PM and I will write a tutorial about binary and stuffs.

Calculator =D. I am almost done making mine from scratch (Did not use any components from other calculators).