Following my initial project proposal, my final project plan still stick with the pinball table idea, but I want to make something different. Pinball table is a lonely machine, basically, you play with a fixed set up with machine. So i decide to make a pinball table that could be played with others.
This will be a pinball table that could be played by two people together. It will has an elevated center and declined ends, It will be a battle type of pinball game, two people play from both side. Balls will be released from the center and the players can use the flipper to attack and defense, when the balls fall down to the bottom, the opponents score and the socore will show on LCDs.
Many people have done homemade pinball table project. Here are some examples:
    http://youtu.be/4vFWbeoz0wk
    http://youtu.be/f2yXXSXe744
    http://youtu.be/X5lVlMcGBFQ
 MDF
    plywood
    acrylic
    3D Printing filament
    resin
    fiber glass
    chemical wood (or machinable wax)
    ATMega328
    LCD 1602
    CNY70 optical sensors
    4.7K ohm resistor
    100 ohm resistor
    10K ohm resistor
    metal wire
    22p capacitor
    104p capacitor
    10K potentiometer
    16MHz crystal
    micro buttom
    LEDs
    
local electronic vender
    digitkey
    wood suply
    casting material store
    arcrylic suppier
    scrap from our fablab
     
electronic parts roughly under 30 USD
    wood parts around 30 USD
    casting about 10 USD
    3D Printing 10 USD
 pinball table main frame
    pinball table desktop
    flipper units
    scoring system
    table top lay out and ramps
    ball circulation system
    
main frame
    desktops plus surface
    flipper units
    electronic parts
    ball criculation system
    adding desktop objects(layers, orbits, obstacles)
    
how to intergrate the scoring system with the machine body?
how to kick off and end the game?
    how to make this project has expandable opportunity? 
electronic parts ----------------May 18~28th
main frame ---------------------May 28~29th
flipper,objects------------------May 29~31st
assembling---------------------May 31~Jun2nd
testing and debugging--------Jun 2~4th
The pinball machine could work smoothly with the correct score count and make an enjoyable gaming experience.
