Transcript Car RamRod
Car RamRod Bringing Pinball Into the Future! Brian Arment, Ryan Hunter, Aaron Shoaf Williams® Touchdown • Originally Produced November of 1967 • Electromechanical • Solenoid and relay driven • No solid-state devices • Not in working order Original Internals Relays and solenoids controlling game play Relays and solenoids controlling scoring 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. Outline • Micro-Controller and Board • Driver/Step-up Board • Playfield Interaction • A/V Controller • Display • Audio Overview User Input Micro-controller 25 Vac 6 Vac Playfield A/V Controller Power Supply Driver Board 5 VDC Display User Input • Two Flipper Buttons • Start RF CR SB LF Coin or Manual Operation • MC 14043 Quad SR Latch – De-bouncing MC 14043 4 line bus to MCU 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. Micro-Controller Game Option Switches EPROM Sensory Input MC68HC11 RAM A/V Controller Driver Board 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 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. Driver Board Logic-level input from MPU Pull up resistors and latches 6/24V AC Smaller BJT’s (300 mA) for the lamps Larger BJT’s (3-8 amps) for the coils To Solenoids To Lamps 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 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 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 A/V Controller Current Score Display Controller/Decoder -Probably an FPGA -Could also be a ROM -Can display customs graphics Score Display Points Display LED Bar Graph Play Select Audio Controller -Several sound bits stored in flash memory -A programmable ROM selects the correct track -D/A converter outputs RCA Speaker System 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 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 Schedule 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 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? Ask them meow!