Registration for the 1st annual IEEE​​& IEEE WIE Windsor section Electrical circuit design contest is now open.
About the competition:
You can design any electrical circuit using 555 timer.
You cannot use digital components but you can create your own digital gates from transistors.
Here are some projects ideas:

Motor PWM
Reaction Timer Game
4 Way Traffic Lights
Driving many LEDs
Bike Turning Signal
Police Lights
Automatic Curtain …