Lit House Christmas Ornament

It started with the idea to make a snowflake, but since there seemed to be tons of other snowflakes and trees that I knew I needed to create something that wasn't already being done. The only other idea that came to mind was going to watch Christmas lights around town. So I set out to create a house that had LEDs that could be controlled by simple programming. It uses I2C commands to control 2 byte wide output ports. The microcontroller sleeps between each command, and for how long based on which mode is currently being displayed. Since it uses the watchdog timer, there are a few options for time that are explored in each mode.

It has the following modes

• ALL - (on)
• ALL - (flashing)
• Alternating even/odd - (flashing)
• Alternating even/odd - (on/off)
• Binary counter
• Grey code counter
• Knight Rider scanner (only middle row)
• Looping around roof
• Random (flashing)
• Random (on/off)
• Right shift in 1 until all on, then left shift in 0 until all off