Machine Features

8 Foot Runway

• a good size for household use

3 Digit Electronic Score Display

• displays the current score
• contains 20 LEDs

1 Digit Electronic Ball Count Display

• displays the current ball count
• contains 7 LEDs

5 Scoring Pockets

• 50, 40, 30, 20, 10 points per ball
• increments score display

Ball Count Switch

• increments the ball count display

Coin Mechanism

• adds credit
• accepts US quarters, rejects all other currency

Start Button

• Bypasses the coin mechanism
• recalls score of last game

Game Over Light

• indicates the end of the game
• contains 1 LED

Winner Light

• indicates the player has achieved a score greater than a preset Winner Score (about 250 pts)
• contains 2 LEDs

Free Game Light

• indicates the player has won a free game
• contains 1 LED

Speaker

• idle music
• pocket sounds
• simple melodies (Winner Song, High Score Song, Free Game Song)

Solenoid (or Servo Motor)

• controls the ball release mechanism

8 Position Dip Switch

• enables/disables idle music
• enables/disables start button
• enables/disables free games
• defines 1 credit as equal to 1,2,3, or 4 quarter(s)
• controls other user preferences
• allows future expansion

Computer Program Class Diagram and I/O Dependencies

I'll use this diagram to guide the skeeball computer program development.  Input devices are green.  Outputs are yellow. I/O devices are orange, Computer code is blue, and code modules are light blue.