Jump to content

Photo

SCART-GENIE V1.0


32 replies to this topic

#1 Shift838 OFFLINE  

Shift838

    River Patroller

  • 2,052 posts
  • SHIFT838
  • Location:Texas

Posted Tue Jan 16, 2018 2:53 PM

All,

 

After my needless failures of trying to solder a DIN connector for my Geneve to work on testing a SCART to HDMI converted, I decided since I have seen it work as well as using a LCD like the Samsung 910mp or 510mp maybe a small board would be nice to have.

 

I have designed one in Eagle and it measures about 2.8" x 3.2".

 

I will be proving it on a breadboard before I decide to order a few prototype boards to see if I need to make any revisions.  Once ready I will release them.

 

What it does:

 

  • Allows a Geneve 9640 to connect via SCART to either
    • Directly to a SCART enabled monitor (if that monitor is supported)
    • Directly to a SCART to HDMI video converter
  • Dip switches used to set if using SCART Monitor or SCART to HDMI
  • utilize a standard 2.1mm wall wart for 3v DC
  • Stereo Phono Jack
  • Dipswitch to enable or disable Stereo phone jack for selection of Internal or External speakers

 

The thought is that a standard 8pin HD audio cable male to male such as used for Monster speakers as these are shielded very well that will connect directly to the Geneve and then to the SCART-GENIE device.  A male to male SCART cable to connect from the SCART GENIE device to the SCART monitor or SCART to HDMI video converter.

 

Parts on the board:

 

  • 1 x SCART Female PCB mount connector
  • 1 x 8 Pin DIN PCB mount connector
  • 4 x 4 position dip switches
  • 1 x 2 position dip switch
  • 4 x 1k Trimmer PCB mount (controls CSYNC, R,G,B lines) for final adjustment if using a SCART monitor
  • 2.1mm DC Power Jack PCB mount
  • 1 x Stereo phono jack for use with PC speakers

I have finished tracing all the connections on the PCB layout and all check out on paper.  

 

Once I finish proving it out and order the prototype boards and get them all to production level then I'll post it here.  I'll be doing a board order once done and if you want it assembled and tested or if you just want the board.

 

PM if you are interested.

 

Attached Files


Edited by Shift838, Fri Jan 19, 2018 8:06 AM.


#2 BeeryMiller ONLINE  

BeeryMiller

    Chopper Commander

  • 225 posts

Posted Tue Jan 16, 2018 4:10 PM

Chris,

 

I've got a working monitor at the moment, though I know it is old and the screen is not huge.  It was free with the Geneve at the time, so i can not complain.

 

Your board.  You plug it into the Geneve, and if I understand things correctly, it takes another device SCART to HDMI to then allow me to plug into a HDMI monitor???

 

Will all HDMI monitors work?  As far as estimation, what would be costs between your device and available SCART to HDMI converter if my understanding is correct on the requirements?

 

Trying to get an idea.  I'm interested, just not at a 100% ready to commit until I know some more details.

 

Beery



#3 Shift838 OFFLINE  

Shift838

    River Patroller

  • Topic Starter
  • 2,052 posts
  • SHIFT838
  • Location:Texas

Posted Tue Jan 16, 2018 4:18 PM

Chris,

 

I've got a working monitor at the moment, though I know it is old and the screen is not huge.  It was free with the Geneve at the time, so i can not complain.

 

Your board.  You plug it into the Geneve, and if I understand things correctly, it takes another device SCART to HDMI to then allow me to plug into a HDMI monitor???

 

Will all HDMI monitors work?  As far as estimation, what would be costs between your device and available SCART to HDMI converter if my understanding is correct on the requirements?

 

Trying to get an idea.  I'm interested, just not at a 100% ready to commit until I know some more details.

 

Beery

 

Beery,

 

The board plus into the geneve with a standard 8 pin male to male DIN cable.  It does not replace a SCART to HDMI and just allows a user to use either a SCART monitor or a SCART to HDMI converter with an HDMI monitor as well as external speakers.  The whole reason to make t his board was to make it easier to  hook up to monitors because those damn DIN connectors are such a hassle to solder.  This way you just buy existing cables and PLUG-N-PLAY.  ( I could not resist the Windows95 slogan!)

 

SCART Monitor:

 

Geneve --> 9640_Genie --> SCART monitor

 

SCART to HDMI converter:

 

Geneve --> 9640_Genie --> SCART to HDMI Converter --> Monitor

 

DISCLAIMER: Also not all SCART to HDMI converters work the as well as others.  There are a couple like the Elefant ( i'll need to verify the spelling) that work's good.  And you would be able to use it with any HDMI monitor or KVM.  I have also seen that not all HDMI monitors work as others as well.  I have seen on a 32" 1080p tv that it worked flawlessly and there was no interference, but on a small 19" HDMI 720p TV i had interference waves. 



#4 mizapf ONLINE  

mizapf

    River Patroller

  • 2,894 posts
  • Location:Germany

Posted Tue Jan 16, 2018 4:38 PM

SCART-to-HDMI means there is some analog-digital conversion, right? As far as I know, DVI had an option to accept analog signals (as DVI-I, not DVI-D), but HDMI?



#5 arcadeshopper ONLINE  

arcadeshopper

    River Patroller

  • 2,838 posts
  • Location:Portland, Oregon USA

Posted Tue Jan 16, 2018 5:50 PM

awesome! i can probably solder one of those and have it not look like carp!



#6 --- Ω --- OFFLINE  

--- Ω ---

    오메가

  • 11,143 posts
  • Location:워싱턴 주

Posted Tue Jan 16, 2018 9:13 PM

awesome! i can probably solder one of those and have it not look like carp!

 

Typo!  I don't think you meant...

Attached Files

  • Attached File  CARP.gif   36.44KB   3 downloads


#7 Lee Stewart OFFLINE  

Lee Stewart

    River Patroller

  • 3,556 posts
  • Location:Silver Run, Maryland

Posted Tue Jan 16, 2018 9:14 PM

awesome! i can probably solder one of those and have it not look like carp!

 

I don't know—Goldfish are pretty good-looking carp!



#8 arcadeshopper ONLINE  

arcadeshopper

    River Patroller

  • 2,838 posts
  • Location:Portland, Oregon USA

Posted Tue Jan 16, 2018 9:20 PM

Mmhmm15aeb65b3bf947141839756d3691c0db.gif

Sent from my LG-H830 using Tapatalk

#9 Opry99er ONLINE  

Opry99er

    Quadrunner

  • 8,807 posts
  • Location:Hustisford, WI

Posted Tue Jan 16, 2018 9:55 PM

 
Typo!  I don't think you meant...




Thats an Asian carp (or BigHead carp)

The common carp is a magnificent creature with golden scales and clean lines. :D

#10 Shift838 OFFLINE  

Shift838

    River Patroller

  • Topic Starter
  • 2,052 posts
  • SHIFT838
  • Location:Texas

Posted Wed Jan 17, 2018 7:43 AM

SCART-to-HDMI means there is some analog-digital conversion, right? As far as I know, DVI had an option to accept analog signals (as DVI-I, not DVI-D), but HDMI?

 

The SCART to HDMI converter does all the conversion within it.



#11 Shift838 OFFLINE  

Shift838

    River Patroller

  • Topic Starter
  • 2,052 posts
  • SHIFT838
  • Location:Texas

Posted Thu Jan 18, 2018 9:36 PM

I have updated the image in the first post.  I changed out the trimmers to 3362P.  The ones I had before were just placements until I could get this component created in Eagle.



#12 OLD CS1 OFFLINE  

OLD CS1

    River Patroller

  • 4,589 posts
  • Technology Samurai
  • Location:Tallahassee, FL

Posted Tue Jan 23, 2018 10:47 PM

SCART-to-HDMI means there is some analog-digital conversion, right? As far as I know, DVI had an option to accept analog signals (as DVI-I, not DVI-D), but HDMI?

 

There are a group of pins on the DVI-I connector which carry what is VGA (DVI-A.)  While I have never seen this, someone else here reports that some monitors have a DVI-I connector with the extra analog pins to accept an SVGA signal input without the use of a separate SVGA input.  I have only ever seen the DVI-I on a video card, never a monitor as the monitors will have a DVI-D connection.

 

HDMI supports DVI as an overlapping signal-set without audio.



#13 Shift838 OFFLINE  

Shift838

    River Patroller

  • Topic Starter
  • 2,052 posts
  • SHIFT838
  • Location:Texas

Posted Fri Feb 9, 2018 5:15 PM

I have been chatting with JediMatt and he pointed me to a Sync Cleaner using a LM1881 to clean up the Sync signal for the Geneve.  I have built one on a breadboard and it seems to do a pretty good job.

 

I have tested it on my SCART to HDMI converter.

 

I have just put this on a breadboard and I will be working to implement it within my Scart-Genie board.

 

not much wiring for it.  It basically takes the CSYNC signal and cleans it up before it outputs.  using this method I was able to remove the 10k trimmers out of my cable.  This could mean a smaller PCB for the Scart-Genie..

 

Smaller = Cheaper...

Attached Files


Edited by Shift838, Fri Feb 9, 2018 6:04 PM.


#14 arcadeshopper ONLINE  

arcadeshopper

    River Patroller

  • 2,838 posts
  • Location:Portland, Oregon USA

Posted Fri Feb 9, 2018 6:47 PM

cool man, that's great. hurry up I need one! :)



#15 Schmitzi ONLINE  

Schmitzi

    River Patroller

  • 4,084 posts
  • ToXiC
  • Location:Germany

Posted Sat Feb 10, 2018 6:31 AM

:music: :lust: :thumbsup:



#16 marc.hull OFFLINE  

marc.hull

    Stargunner

  • 1,162 posts
  • Location:Oklahoma CIty.

Posted Sun Feb 11, 2018 5:36 PM

I remember that Tony K. drew the power for the scart signal from the 12v on the video out from the geneves video port. Would this be possible to include in your design and eliminate the extra ps?

#17 InsaneMultitasker ONLINE  

InsaneMultitasker

    Stargunner

  • 1,875 posts

Posted Sun Feb 11, 2018 8:23 PM

Pulling the 12v from the Geneve video port is a nice option so long as it doesn't introduce noise. I know that Tony switched to a discrete supply and/or pulling the voltage from within the monitor, in part due to signal noise issues.  I later realized that Tony's SNUG system (AVPC video) and my Geneve system, both powered with an AT power supply, exhibit video signal noise that isn't present when I put the same hardware into a PEB. Not sure if it is the AT power supply or the 12v regulators going into bypass or a grounding issue or some other problem, but it was most curious to see two systems behave in the same manner.



#18 Shift838 OFFLINE  

Shift838

    River Patroller

  • Topic Starter
  • 2,052 posts
  • SHIFT838
  • Location:Texas

Posted Sun Feb 11, 2018 9:15 PM

I remember that Tony K. drew the power for the scart signal from the 12v on the video out from the geneves video port. Would this be possible to include in your design and eliminate the extra ps?

 

It is possible.  I may make an option for that.  I am currently thinking of powering it via a 5v USB adapter and dividing the voltage with JediMatt's design to get the volts down to around 2.2 volts, which is sufficient.  i'll look into it.



#19 jedimatt42 OFFLINE  

jedimatt42

    Stargunner

  • 1,403 posts
  • Location:Beaverton, OR

Posted Mon Feb 12, 2018 1:24 PM

Technically 12V has the advantage of signaling a 4:3 aspect ratio on one of those SCART pins (pin 16 I think), if you have an actual SCART input on an HDTV... Most physically 4:3 displays probably ignore it though.  So probably not functionally significant.

 

I personally didn't want to pull any power off the Geneve if I didn't have to.   People here seem to be obsessed with pulling external peripheral power from internal sources.  I suppose the 'RF modulator' power is designed for that though.  I'd take InsaneMultitasker's anecdotal evidence as "It is a bad idea, no need to support bad ideas, when the original design was a fine idea" (Just my opinion btw)  It should work, but why? if it may create a less happy experience. 

 

-M@



#20 Shift838 OFFLINE  

Shift838

    River Patroller

  • Topic Starter
  • 2,052 posts
  • SHIFT838
  • Location:Texas

Posted Mon Feb 12, 2018 3:15 PM

Technically 12V has the advantage of signaling a 4:3 aspect ratio on one of those SCART pins (pin 16 I think), if you have an actual SCART input on an HDTV... Most physically 4:3 displays probably ignore it though.  So probably not functionally significant.

 

I personally didn't want to pull any power off the Geneve if I didn't have to.   People here seem to be obsessed with pulling external peripheral power from internal sources.  I suppose the 'RF modulator' power is designed for that though.  I'd take InsaneMultitasker's anecdotal evidence as "It is a bad idea, no need to support bad ideas, when the original design was a fine idea" (Just my opinion btw)  It should work, but why? if it may create a less happy experience. 

 

-M@

 

Matt,

 

The more I think about it the more I agree.  I think pulling the power from a 5v USB power supply will be just fine since most of us have these things just lying around anyway.  Also, anything that could produce interference noise would be bad too.  


Edited by Shift838, Mon Feb 12, 2018 3:16 PM.


#21 InsaneMultitasker ONLINE  

InsaneMultitasker

    Stargunner

  • 1,875 posts

Posted Mon Feb 12, 2018 3:39 PM

 

  I think pulling the power from a 5v USB power supply will be just fine since most of us have these things just lying around anyway.  Also, anything that could produce interference noise would be bad too.  

 

I wasn't trying to steer you into not testing the 12v power.  It is a legitimate source of power available on an unmodified Geneve (and TI) video port.  I only intended to share what I had learned from Tony, and the later realization that his system may have been the cause of the interference, not the use of the 12v power.  I don't think I made my point very clearly. 



#22 marc.hull OFFLINE  

marc.hull

    Stargunner

  • 1,162 posts
  • Location:Oklahoma CIty.

Posted Tue Feb 13, 2018 6:32 PM

Perhaps you could option the board for both usb power or PEB card power. It would only add a jumper block and 2 more resistors ?

#23 Shift838 OFFLINE  

Shift838

    River Patroller

  • Topic Starter
  • 2,052 posts
  • SHIFT838
  • Location:Texas

Posted Tue Feb 13, 2018 6:51 PM

Perhaps you could option the board for both usb power or PEB card power. It would only add a jumper block and 2 more resistors ?

 

That is true, would not take up too much space.



#24 marc.hull OFFLINE  

marc.hull

    Stargunner

  • 1,162 posts
  • Location:Oklahoma CIty.

Posted Wed Feb 14, 2018 6:27 PM

That would be great if you could do that. Any ETA?

#25 Shift838 OFFLINE  

Shift838

    River Patroller

  • Topic Starter
  • 2,052 posts
  • SHIFT838
  • Location:Texas

Posted Thu Feb 15, 2018 4:38 PM

That would be great if you could do that. Any ETA?

 

Been swamped at work.  I'm also waiting on some parts to be delivered to prove it out.  i'm thinking of using the sync cleaner as a through hole design to make it easier to solder too..  






0 user(s) are browsing this forum

0 members, 0 guests, 0 anonymous users