Seeing as I haven't seen any threads relating to it, lets make one about redstone! Why, cause it's interesting and why not.
Post your creations below and feel free to go into detail if you wish!
I'll get the ball rolling...
I got bored one night, so I made a short countdown timer.
So the way it works is the player presses a button to send a signal all the way to a piston. This piston pushes a piece of wool over a redstone torch and a sticky piston, starting the entire mechanism. The wool becomes powered by the torch and sends 2 signals, one to the rest of the mechanism, and the other to a loop used to reactivate the wool to send multiple signals over and over, in order to keep the timer ticking.
So what about the other signal? Well it gets sent to this lovely bit. The signal splits to 4 sets of pistons, all of which are set to push at different times. They push what I like to call, the "Code Wheel™". Inside the wheel is a redstone signal powered by a torch. On the other side is a set of branching redstone paths that lead to sets of pistons that are the clock face. The "Code Wheel™" is used to complete the circuit between the power source and the clock face, sending different signals to different pistons to display digital numbers.
The white wool in the wheel completes the circuit, and the glass acts as a placeholder since it can be pushed by pistons but can't be powered by redstone. I'd record a video of it working, but I don't really have recording equipment, except for my phone...
But thats about the extent of my redstone knowlegde. What about you?