Car RamRod Bringing Pinball Into the Future! Brian Arment, Ryan Hunter, Aaron Shoaf.
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Transcript of Car RamRod Bringing Pinball Into the Future! Brian Arment, Ryan Hunter, Aaron Shoaf.
Car RamRodBringing Pinball Into the Future!
Brian Arment, Ryan Hunter, Aaron Shoaf
Project RefresherProject Refresher
• 1967 Williams Touchdown
• Electromechanical
• Changing to solid state
• Game play similar to original
OutlineOutline
• Micro-Controller and Board
• Driver/Step-up Board
• Playfield Interaction
• A/V Controller
• Display
• Audio
Overview
User Input
Micro-controller
Driver Board
Playfield(Sensors, Lights
andSolenoids)
A/VController
DisplayPower Supply
6 Vac
5 VDC
25 Vac
User InputUser Input
• Two Flipper Buttons
• StartCoin or ManualOperation for Credits
• MCT62 Optoisolator feeds into a latch (HC373, CPLD enabled) to hold value until the MCU reads its value.
RF LF SB
MCT62
CR
8 line bus to MCU
HC373
Transistor enabled with signal from MCU
(so that flippers can’tbe used when not in play)
Micro-ControllerMicro-Controller
• MC68HC11E0
• Reads from latches (74373) that latch the value of the sensors from the playfield.
• Writes to latches to control the audio and visual output of the machine.
• Writes to latches to control the solenoids, lamps, and flippers on the playfield by enabling MOSFET gates.
•Data lines and high order address bits are buffered with 74245
Micro-ControllerMicro-Controller
Micro-ControllerMicro-Controller
EPROM & SoftwareEPROM & Software• AT29C256 Flash
• Basically a MCU controlled state machine.
• Will implement a polling scheme to run.
• Runs a demo program while waiting for credits and start.
• During game play polls the latches to see if a sensor has been hit and updates the the score, lights and audio accordingly.
• Once number of balls and credits run out reverts back to idle mode.
Simple Software StatesSimple Software States
Init
Play
Idle Demo
•Idle mode waits for coin insertion and depression of the start button.
•Also pushes into demo mode after a certain amount of time in idle.
•Upon entering play mode, flippers, pop bumpers, kickers, and all sensory inputs are enabled.
Driver BoardDriver 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
Driver BoardDriver Board
• Needs to step up from 5V DC to 6 or 24v rectified AC
• Optoisolators to separate the logic from the higher voltages. MCT62
• Using power MOSFET’s to control pop-bumpers, flippers and kickout solenoids each need a lot of current. IRF540 25A for flippers, IRF840 8A for all others
• Lights need less current so can use smaller transistors. ZVN210 400mA
Driver BoardDriver Board
Larger FETS (3-8 amps) for the coils
Smaller FET’s (400 mA) for the lamps
Pull down resistors and optoisolators
Logic-level input from MPU
To Solenoids To Lamps
6/24V AC and 5VDC for soleniod driving
Driver BoardDriver Board
Driver BoardDriver Board
• Current status and operation• Fully functional in solenoid driving
• Lamps have been tested and are currently being wired
• Active switching board used to test external interface via custom 38 conductor cable
• Current status and operation• Fully functional in solenoid driving
• Lamps have been tested and are currently being wired
• Active switching board used to test external interface via custom 38 conductor cable
PlayfieldPlayfield
• Replaced the rubber in order to make the ball bounce better.
• 30 individually controlled lamp circuits (~100 individual lamps).
• 8 coil circuits.
• Both controlled by the driver board.
•All rubber and lamps replaced
DemoDemo
A/V ControlsA/V Controls
VisualCurrent score/state latched
from the MPU
Score Display
Points Display
LED Bar Graph
AudioA certain sequence of bits is written
to a 555 timer chip from the MPU when aspecific event occurs in the game.
Speaker System
CPLDMatrix or 7-segmentLED displays coding
VR3 – VS1003BPlays a sound bite for
each bit pattern
AudioAudio
• USB Jump Driver file storage
• Virtual Reality Sound Labs FM transmitter for file select, play, and D/A converter (VS1003B decoder - MP3, WAV, MIDI)
• Reverse engineer to find line level audio and play to stereo jack for speakers.
AudioAudio
DemoDemo
QuickTime™ and aMotion JPEG OpenDML decompressor
are needed to see this picture.
ScheduleSchedule
MilestonesMilestones
1. Milestone 1
• Driver board functionality
• Playfield operation
• Hopefully MCU performing at least NOP’s
2. Milestone 2
• Some system integration (boards correctly interacting with each other to some extent)
• Maybe run a demo program with lights.
Risks and Contingency Plan
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
Questions?Questions?
Ask them meow!