Raspberry Pi to CRT Monitor?

[simko]

Hi everyone!

Scored an old arcade cabinet that has some issues, the crt monitor is in great shape, my plans for it are to replace the origional board with a raspberry pi and make a MAME cabinet.
I was thinking, instead of replacing the monitor with a flat screen monitor that i have, why not try to use the crt monitor?

Does anyone know of a way to have the raspberry pi connected to a crt monitor?

thanks in advance!

[Malenko]

is the monitor in there a computer monitor or an arcade monitor?

I dont know of a way to have the pi output to 15Hz , not saying its not possible, just that I dont know how to do it.

[simko]

stock arcade monitor! The cabinet is complete with power supply, coin mechanisms etc, i wanted to use as much as i can, aside from changing the control pannel.

I'll see what i can dig up on the net!

thanks anyways!

[ed12]

do not take my left nad for this...
i know they are not adver's here..but this will help u out,
run 1 myself with a pie>>lcd and or vga<<
http://www.jammaboards.com/store/cga-ega-yuv-to-vga-arcade-hd-converter-pcb-gbs-8220-gbs-8220.html

ed

[Malenko]

do not take my left nad for this...
i know they are not adver's here..but this will help u out,
run 1 myself with a pie>>lcd and or vga<<
http://www.jammaboards.com/store/cga-ega-yuv-to-vga-arcade-hd-converter-pcb-gbs-8220-gbs-8220.html

ed

wrong way conversion ed, need to go from VGA to arcade not arcade to VGA

[ed12]

this much i know
my point was to point the op to the way...
i use a slightly dif board by the same company..
which where the link i posted was the olny 1's to have them from a dist. in !!canada!!..

ed

[Malenko]

ahhhhh gotcha   

[pbj]

It's got composite out.  They're probably fairly rare these days, but all the laser disc games had Composite -> CGA converters in them.  I've got one in the parts pile that came out of a Mach 3.  You cannot have mine.

[Slippyblade]

wrong way conversion ed, need to go from VGA to arcade not arcade to VGA

RPi's don't have VGA out.  They have a composite out and an HDMI.  I've seen some folks use adapters to do:

HDMI -> VGA -> CGA

But that's ugly.  I know very little about arcade monitors, but could you use a cheap HDMI to component cable (like $5-$10) and tap those outputs to the inputs of an arcade monitor?

[ed12]

comp out is correct,same as base line audio.
u can also order a andorid board with hdmi out,which hook's right on top of the pi..
then up/down convert
or u can use the on board codec if u like coding ?
but as was pointed out it can get ugly.
>But that's ugly.  I know very little about arcade monitors, but could you use a cheap HDMI to component cable (like $5-$10) and tap those outputs to the inputs of an arcade monitor?<
it dose take some  thought to pull it off clean like.

and yes u can do the cheap out way..>hdmi< ,just plan it through
ie: play around a byte to see what u want to do

ed

[Malenko]

wrong way conversion ed, need to go from VGA to arcade not arcade to VGA

RPi's don't have VGA out.  They have a composite out and an HDMI.  I've seen some folks use adapters to do:

HDMI -> VGA -> CGA

But that's ugly.  I know very little about arcade monitors, but could you use a cheap HDMI to component cable (like $5-$10) and tap those outputs to the inputs of an arcade monitor?

VGA is a display standard , a D-Sub is the connector. I get the confusion, its common, but Im just clarifying my post.

[lostboy4480]

I think this should work...

http://www.jammaboards.com/store/vga-to-cga-pal-ntsc-video-converter-pcb-gbs8100.html

Would just need to convert HDMI to VGA and then use this device.

[ed12]

default pi for noob's

>NOOBS INSTALLATION INSTRUCTIONS

1. Insert an SD card that is 4GB or greater in size into your computer.
2. Format the SD card using the platform-specific instructions below:
   a. Windows
      i. Download the SD Association's Formatting Tool from https://www.sdcard.org/downloads/formatter_4/eula_windows/
      ii. Install and run the Formatting Tool on your machine
      iii. Set "FORMAT SIZE ADJUSTMENT" option to "ON" in the "Options" menu
      iv. Check that the SD card you inserted matches the one selected by the Tool
      v. Click the "Format" button
   b. Mac
      i. Download the SD Association's Formatting Tool from https://www.sdcard.org/downloads/formatter_4/eula_mac/
      ii. Install and run the Formatting Tool on your machine
      iii. Select "Overwrite Format"
      iv. Check that the SD card you inserted matches the one selected by the Tool
      v. Click the "Format" button
   c. Linux
      i. We recommend using gparted (or the command line version parted)
      ii. Format the entire disk as FAT
3. Extract the files contained in this NOOBS zip file.
4. Copy the extracted files onto the SD card that you just formatted so that this file is at the root directory of the SD card. Please note that in some cases it may extract the files into a folder, if this is the case then please copy across the files from inside the folder rather than the folder itself.
5. Insert the SD card into your Pi and connect the power supply.

Your Pi will now boot into NOOBS and should display a list of operating systems that you can choose to install.
If your display remains blank, you should select the correct output mode for your display by pressing one of the following number keys on your keyboard:
1. HDMI mode - this is the default display mode.
2. HDMI safe mode - select this mode if you are using the HDMI connector and cannot see anything on screen when the Pi has booted.
3. Composite PAL mode - select either this mode or composite NTSC mode if you are using the composite RCA video connector.
4. Composite NTSC mode

If you are still having difficulties after following these instructions, then please visit the Raspberry Pi Forum ( http://www.raspberrypi.org/phpBB3/ ) for support.<

attached pdf .ins manual

ed

[ed12]

if our s/w form can handle over 2meg
i will up-load the rest
when u are searching for file's
make SURE  KNOW YOUR BUILD,
ie: some a build's will not work with b build's
and reverse
it as a rule state's it
just watch yourself
happy codeing

ed

[simko]

Hi everyone,

first, thanks for all the help and your responses. after some google digging, i found this "guide" although im sure i will have many many more questions while i try to set this up

here is the link:
http://arrifana.org/blog/2012/12/connection-a-raspberry-pi-to-an-old-15khz-arcade-monitor/

[ed12]

yes that is the write up that led me to the board i spoke of..
and as i am in canada and have a built hate for fleabay..
i wanted an in country suppiler..
but if u look at it total cost for convert is about $45.00,
there price was 22.00lb's >english< which is 44.00 . cdn
or just there as of...
yes copy the .cfg file and or the link U WILL USE IT FOR REFERNE MATERIAL

ed

[ed12]

here u go

https://www.sdcard.org/downloads/formatter_4/eula_windows/

http://www.raspberrypi.org/phpBB3/

ed

[simko]

Well with lots of expert advise from Ed over the phone last night i finally got some progress made... of course after moving this big thing into my place...

[MonMotha]

You can run SD (480i or even 240p) over HDMI, assuming the video controller on the Pi is capable of such low pixel clocks.  You'll need an RGB DAC to hook it up to the monitor, and maybe a video amp, since most of the DACs will output broadcast industry-standard 0.7Vpp, not the ~3Vpp that arcade monitors typically want.  The somewhat-popular "HD Fury" may be capable of low res, but check.  This is of course trivial to slap together at the component level, but the interconnect is such that a PCB is needed, so an off-the-shelf solution is probably desired...

[ed12]

thk-ufor the pic's
on the left hand side >from back < u will c the full game board >top<
below that is a switching power-suppy...nice score..
that is a normal res.kv74-xx series monitor..it pull's straight up and out..
u do need a hand there..ring the bell..
u remove the complete sliding panel,power-supply and board at 1 pull.ie the full thing will
slide out..we will be using that power supply,and "back-board" again,we will just remove the main game board,
just make sure every thing is un-plugged..no fear's there molex..can olny but fit 1 way back in..
reason we want the back board is to a mount everything u will be hooking in..
ipac4=usb for pi.(b) perfect fit also will work with pi(a)

the transformer :board: is a complete isolation transformer..we will be using it also..
that is an early >dynamo/daymco< cab..nice score:)

if the monitor work's?, which we can and will test in short order
u just saved a boat load of $$$$..

also we will reuse 99% of the unit >game-board-aside<

that cabinet should support veritical >up-right< display...

for now we will use a video output of the pie to get it going..
so a spare tv with >hdmi and or video in< will do just fine as we do the rest....

ed

[ed12]

yes MonMotha
correct..he is running pi(b)
it support's all hdmi..
but hey we just got going on this cab tonight..
so i said hang on let's post some pic's up-here,take some good feed-back and see if we can get the pi running as i do..i am open..but if u look at the pix's the op has saved a boat load of $$,ie the door is now open..>full mame< on a :sd-card:,thk-u mame coder's

thk-u for input please follow along and help.  >input here<

ed

[ed12]

ok i have some interesting news for a few ppl here in london ontario..
we all should know by now that a1-counter-part's is fully colsed..suck's
because that WAS where i gong to alway's go to get my rasberry stuff..
GOOD new's
where my WHAREHOUSE  is there is re-sell shop >electronic's<,of all kind's,
GOD send for me..welp here
the owner's name is richard
i am olny gonna plug this once as i am thirlled,so mod's i know he is not a adver here >yet<,but cut me the grass please
www.elelsu.com
turn's out HE HAS A FULL WALL OF RASBERRY PI STUFF,by stuff i mean everything...
he has olny 2 of the pi(b) left as it was replaced with pi(b2),more ram i guess? and he is expecting more...
but i say every add on is there i mean every add on is there....


ed

[matsadona]

Something I found out there:


Probably the signal needs to be amplified a bit to the correct level.

[ed12]

the comp to rgb converter will
up the level to ttl..


the machine's old power transformer
would u please up-load a few pic'ss of it,i need to find the iso-side winding's..
i expect it is a multitap main's in ie:117vac and or 220 vac common for the day..
but that switcher should lead us the way if it was tied into the iso side of the power trans ?

ed

[simko]

Finally got some pipctures

[Malenko]

Im 99% sure that green wire with the yellow stripe shouldnt be on the ground terminal, it should be on the FG terminal

[ed12]

ya if it goes back into the "ac" loop feed i would move it..
that wg need's an iso..no doubt about it now
snag a pic of the power trans..and up-load it,tonight if u can,
as i plan on going in friday after 12:noon

ed

[simko]

I hope this is the power trans youre speaking of!
can i remove this from the cabinet? will i get zapped?

[ed12]

ya that's a multi confiq trans..
ie: 120-240 depending on which way u set the >input< to the molex plug..
if u have the name of the cab i will chase down the manual for u..to set it right.
and as it all plug's in
rule a apply's
un-plug from a/c then just un-plug the molex's
then un-screw the full steel pan..but just get me the name i will chase it down for u

ed

[lilshawn]

also you will need to power that monitor through that transformer (or another isolation transformer) to isolate from the wall AC it otherwise it will go poof!

[waldo34]

Looks like we are both trying to do the same thing. take a look at my post and let me know you thoughts. I converted the PI to VGA and picked up a  GBS 8100 card to get it to 15 Khz now i'm not sure how to wire it to the monitor. Waldo

http://forum.arcadecontrols.com/index.php/topic,141037.0.html

[ed12]

shawn i planted a 1-1 on his old power spply...
yes the old 1 has a 1-1 iso built in >willmans game<
but that aside it is up and running >monitor<..
the op took the handy avice and turned up the screen control to see a screen
we ha it work's..nice score for a 25"
next is the converter...
>Looks like we are both trying to do the same thing. take a look at my post and let me know you thoughts. I converted the PI to VGA and picked up a  GBS 8100 card to get it to 15 Khz now i'm not sure how to wire it to the monitor. <
waldo what part of the plug did u miss ?
if wired up right ? them running 15khz u may need to tweek
the noob's fourm is full of this stuff
rasberrypi-noob's
r=red
g=green
b=blue
g=ground
s/c=sync

u can go in comp video >from pie<
and convert
u cannot go in hdmi to cga
the older or newer board provides for that 1

ed

[waldo34]

Ed, since my install is slightly different I posted a reply in my thread.

http://forum.arcadecontrols.com/index.php/topic,141037.0.html

Waldo

[simko]

Hi everyone, so a bunch of parts finally showed up so im ready to move on with the project!

I have the manual for the origional arcade cabinet / monitor, i would like to scan the wiring diagram and ask you all a few more questions....for right now, the harness that connects to the crt monitor that i will need to cut into... is that the "jamma harness" ? Just want to know which diagrams to scan... i might just scan them all and post them anyways!

thanks!

[matsadona]

Yes, the video signal wires are in the jamma harness.
What you are looking for are the RED, GREEN, BLUE, SYNC and GND wires/pins.

[lilshawn]

the jamma harness is a "universal" type of card edge connector used to connect the user controls, video, sound, and power in most arcade games.

it has a standard pinout so that if the operator wishes to change the game, it's just a matter of removing the game board and switching it for another.

lots of manufacturers diverge from the "standard" (hence the quotes around it) but rudimentarily, it's compatible with a wide variety of games.

basically you just want to take a look at that connector and find the video (R,G,B,ground,sync) and wire them to your video interface of your device.

keep in mind there are several different monitors out there, all with different video needs. it appears you have a k7000 monitor there which will only accept a 15k standard resolution signal. your device will need to output a video signal accordingly or you risk damaging it by overdriving it. You may also require a video signal booster, depending on how you go about hooking this up to your device.

[crzmx]

I'm working on doing the same on the same rev x cabinet.. How'd it go?