oric sur moniteur RVB ?

If you want to ask questions about how the machine works, peculiar details, the differences between models, here it is !
How to program the oric hardware (VIA, FDC, ...) is also welcome.
PAWI
Private
Posts: 7
Joined: Thu Jul 31, 2014 12:32 pm
Location: France - Lorraine

oric sur moniteur RVB ?

Post by PAWI »

Bonjour à tous,

Pourrait-on brancher l'ORIC sur un moniteur TFT RGB du type utilisé pour une camera de recul sur voiture ou pour visualiser de la video et que l'on trouve à foison sur ebay... (cf. photo). Existe en 7 et 9 pouces, pour des resolutions debutant à 480 x 234 pixels...

Merci pour vos réponses et mes excuses si j'ai envisagé une ânerie..
Attachments
miniteur RVB.jpg

User avatar
Dbug
Site Admin
Posts: 3346
Joined: Fri Jan 06, 2006 10:00 pm
Location: Oslo, Norway
Contact:

Re: oric sur moniteur RVB ?

Post by Dbug »

Good question, I guess it depends of the type of supported inputs.

The screen I have on my car for the rear view camera supports only composite signal, so that would not work on the Oric without some converter, but internally they probably all get converted to RGB, so I would not be surprised if some of these screens can get direct RGB input.

Need more details about the screen :)

User avatar
iss
Wing Commander
Posts: 1081
Joined: Sat Apr 03, 2010 5:43 pm
Location: Bulgaria
Contact:

Re: oric sur moniteur RVB ?

Post by iss »

Most probably your device has only AV-input - this is CVBS or as Dbug already said input for composite video signal.
You can use external RGB to Composite converter (simply search e-bay), relatively not cheap solution but it works.
Else, if you like hardware hacking, there are 2 possibilities (atleast :)):
- open your Oric and get composite signal before the UHF modulator, additionally you need simple 1 transistor inverter-amplifier to adjust signal level - this worked for me - I use portable 7-inch DVD player with the same resolution 480 x 234 pixels.
- hack your device - theoretically there is chance to connect RGB+Synchro signals from Oric directly (or with few resistors) to somewhere on the TV's PCB. For this you will need the service manual and data-sheets for your device.

If there is interest I can post the "know-how" how to convert broken 7-inch DVD player for 3EUR into portable monitor with Composite, S-Video and RGB inputs.

User avatar
coco.oric
Squad Leader
Posts: 555
Joined: Tue Aug 11, 2009 9:50 am
Location: North of France
Contact:

Re: oric sur moniteur RVB ?

Post by coco.oric »

If there is interest I can post the "know-how" how to convert broken 7-inch DVD player for 3EUR into portable monitor with Composite, S-Video and RGB inputs.
Yes, it's a good idea.
If it's not too difficult, i'm interesting in it. It will allow me to go to the ceo visu with a smaller bag. :)
coco.oric as DidierV, CEO Member
Historic owner of Oric, Apple II, Atari ST, Amiga

PAWI
Private
Posts: 7
Joined: Thu Jul 31, 2014 12:32 pm
Location: France - Lorraine

Re: oric sur moniteur RVB ?

Post by PAWI »

N'ayant pas encore acheté ce petit moniteur, je n'ai pas vraiment de détails sur ses possibilités techniques. Pour le modèle dont la photo est jointe, voici les précisions données sur e-bay (http://www.ebay.fr/itm/Moniteur-TFT-LCD ... 2a40b8b600 - adresse de commande en Alsace... vendu 60 €):

Description: Moniteur LCD 7 pour voiture
Système vidéo: PAL/NTSC
Chip: UP CMOS
Résolution: 800 x 480
Angle de vue: 130
Luminosité: 400cd/m²
Contraste: 350:1
Alimentation: DC12V
Connectique: Double port vidéo
Fonctions: Menu OSD, système rétroviseur, AV (CD, VCD, DVD, GPS, caméra)
Dimensions: 194 x 142 x 30 (mm)
Poids: 392g

Il semble n'y avoir qu'une entrée AV... Un schéma pour éventuellement adapter le signal de l'Oric m'intéresse beaucoup !
Attachments
moniteur.jpg

User avatar
Hialmar
Flight Lieutenant
Posts: 322
Joined: Tue Mar 04, 2014 11:25 am
Location: Toulouse, France
Contact:

Re: oric sur moniteur RVB ?

Post by Hialmar »

While there are a lot of French people around here (who said too many ;) ) you'd better write in English to get more answers ;)

Anyway, as coco.oric said, your Oric modification details would be very interesting iss.
Hialmar
CEO and Silicium member.

PAWI
Private
Posts: 7
Joined: Thu Jul 31, 2014 12:32 pm
Location: France - Lorraine

Re: oric sur moniteur RVB ?

Post by PAWI »

There is also this kind of product in France (# http://www.boulanger.fr/tv_muse_m_115_t ... 645882.htm) ... € 75

S-video connector

Available in 9 inches
Attachments
muse.jpg

PAWI
Private
Posts: 7
Joined: Thu Jul 31, 2014 12:32 pm
Location: France - Lorraine

Re: oric sur moniteur RVB ?

Post by PAWI »

Hello iss,

I am very interested by your solution to convert broken 7-inch Portable DVD Player Into monitor with Composite, S-Video and RGB inputs.

User avatar
iss
Wing Commander
Posts: 1081
Joined: Sat Apr 03, 2010 5:43 pm
Location: Bulgaria
Contact:

Re: oric sur moniteur RVB ?

Post by iss »

Here are the pictures.
This is my Pravetz with 7-inch LCD from broken portable DVD player.
(The UHF modulator is removed since long time ago, of course you can leave it as is).
the whole setup
the whole setup
Output signals: white = GND, red = 5V, green = composite video
IMG041.jpg
This simple 1 transistor inverter adjusts signal level to match the AV input. (I'll post the 'schematic')
IMG042.jpg

User avatar
iss
Wing Commander
Posts: 1081
Joined: Sat Apr 03, 2010 5:43 pm
Location: Bulgaria
Contact:

Re: oric sur moniteur RVB ?

Post by iss »

(post continues...)
7-inch LCD closeup
IMG043.jpg
Some HIRES :)...
IMG045.jpg
After Brightness/Contrast/Color adjustment from DVD menu colors are better...
IMG046.jpg

User avatar
iss
Wing Commander
Posts: 1081
Joined: Sat Apr 03, 2010 5:43 pm
Location: Bulgaria
Contact:

Re: oric sur moniteur RVB ?

Post by iss »

Here are 'schematics'.
This is part of the well-known Oric schematic showing where to get AV signal:
AV-out.jpg
And this is the one-transistor stage:
AV-cvt.png
AV-cvt.png (2.95 KiB) Viewed 16990 times
As you can see in first picture I removed R15 and RV1. They can remain, but than R0* (in second picture) should be used.

As conclusion I can say that the quality is not 'the best' but it's fully acceptable.
Some scanlines are missing, so text is bit hard to read, but in general for demo purposes and 'mobile gaming' is OK!

User avatar
ibisum
Wing Commander
Posts: 1293
Joined: Fri Apr 03, 2009 8:56 am
Location: Vienna, Austria
Contact:

Re: oric sur moniteur RVB ?

Post by ibisum »

So whats next - a decent battery-based power supply that'll drive a Cumulus as well, all packed into a nice little briefcase? ;)

User avatar
Hialmar
Flight Lieutenant
Posts: 322
Joined: Tue Mar 04, 2014 11:25 am
Location: Toulouse, France
Contact:

Re: oric sur moniteur RVB ?

Post by Hialmar »

A portable Oric would be nice indeed.

Fabrice made one with a four line screen IIRC but it would be way better with this kind of screen.
Hialmar
CEO and Silicium member.

User avatar
Dbug
Site Admin
Posts: 3346
Joined: Fri Jan 06, 2006 10:00 pm
Location: Oslo, Norway
Contact:

Re: oric sur moniteur RVB ?

Post by Dbug »

What would be nice is to have an hybrid Cumulus with a larger screen, with at least 240x224 resolution, and have the screen used both for the Cumulus UI and the Oric video output :)

Godzil
Squad Leader
Posts: 763
Joined: Sat May 21, 2011 7:21 pm
Location: Between UK and France
Contact:

Re: oric sur moniteur RVB ?

Post by Godzil »

ibisum wrote:So whats next - a decent battery-based power supply that'll drive a Cumulus as well, all packed into a nice little briefcase? ;)
I have one, and running the Oric on battery is just... Delightful :D

Post Reply