2. Car RamRod Bringing Pinball Into the Future! Brian Arment, Ryan Hunter, Aaron Shoaf

3. Williams ® Touchdown Originally Produced November of 1967 Electromechanical Solenoid and relay driven No solid-state devices Not in working order

4. Original Internals Relays and solenoids controlling game play Relays and solenoids controlling scoring

5. Inspiration Newer machines use solid state devices such as those in the more modern machine at right. We will not be mimicking the design but will use the same basic idea in modernizing our old machine.

6. Outline Micro-Controller and Board Driver/Step-up Board Playfield Interaction A/V Controller Display Audio

7. Overview User Input Micro-controller Driver Board Playfield A/V Controller Display Power Supply 6 Vac 5 V DC 25 Vac

8. User Input Two Flipper Buttons Start Coin or Manual Operation MC 14043 Quad SR Latch – De-bouncing RFLFSB MC 14043 CR 4 line bus to MCU

9. Micro-Controller MC68HC11 Handles interrupts for input from sensors on playfield and users. Controls light patterns, scoring, A/V state, game play options, game play state Handles control of driver board for fail-safe solenoid operation.

10. Micro-Controller MC68HC11 EPROM RAM Sensory Input Driver Board Game Option Switches A/V Controller

11. Driver Board Provides Necessary current and voltage for devices like: Solenoids (flippers, pop-bumpers, kickers) Lamps (in playfield and lightbox) Nearly everything on the playboard uses it It is controlled directly by the MPU via logic level voltages

12. Driver Board Needs and Complications: Needs to step up from 3.3-5v DC to 6 or 24v rectified AC Make sure the flipper transistors used can handle up to 8 amps each Need to control around 15-20 different lamp circuits The pop-bumpers and kickout solenoids each need up to 3 amps.

13. Driver Board Larger BJTs (3-8 amps) for the coils Smaller BJTs (300 mA) for the lamps Pull up resistors and latches Logic-level input from MPU To SolenoidsTo Lamps 6/24V AC

14. Playfield (visible) A few stipulations for the upper playfield: Want to keep the functionality as close to the original game as possible Want it to play a bit faster than the original (incline needs to be steeper) Possibly implement larger flippers Need to replace all rubber, lights Need to touch up paint and polish the board

15. Playfield (underneath) A few stipulations for the lower playfield: All the displayed electromechanical relays are replaced by solid state via the fore-mentioned driver board All aluminum wiring is removed and replaced with 18-20 gauge copper wiring All contact switches are cleaned

16. A/V Controller Contains two separate controllers: DAC: Has a file select input with data fed from the MPU Has internal storage of uncompressed WAVE or PCM files. DVC: Reads the current score and points from data register Writes to individual LED panels

17. A/V Controller Display Controller/Decoder -Probably an FPGA -Could also be a ROM -Can display customs graphics Current Score Score Display Points Display LED Bar Graph Audio Controller -Several sound bits stored in flash memory -A programmable ROM selects the correct track -D/A converter outputs RCA Play Select Speaker System

18. Display Since this is a restoration, try to keep the scoreboard looking the same: Replace analog score and point tumblers with individual dot-matrix digital displays Replace mechanical football wheel with LED bar graph Use analog lamps for ball in play section

19. Audio Two 4 inch car speakers Powered subwoofer Run off of A/V controller Speaker receives line level signal from A/V controller A/V Controller

20. Schedule

21. Division of Labor Aaron: Driver Board, Power Supply, MPU, Display, A/V controller, RAM Brian: MPU board, A/V controller, Flash Memory, RAM, Line Bus (controllers), EPROM Ryan: MPU, EPROM, Flash Memory, RAM, Display, Driver Board, Power Supply All: Playfield - wiring, refurbishing, testing

22. Risks and Contingency Plan A/V controller: Implement set of beeps and bells for audio and toned down preprogrammed display art. Cosmetic restoration User Options 3 or 5 ball play #coins / credit Free play Multi-ball

23. Questions? Ask them meow!