The 3th puzzle puzzles everyone it seems.
But don’t give up yet !
And @JackANDJude requested a new one, so here it is !
So, what we want to create is a device which can switch our christmas tree on at random.
The on - off cycle is constant, but the on time is random.
This on time could be easily 2 minutes or more.
We can only use 8 bits, including a power bit and output bit.
And as always - no arduino bit
Good luck !