Amiga RGB to S-Video + composite adaptor - Page 11

TheCorfiot · 25 September 2008, 17:10

Hello all
Just a quick Announcement
Zetro & I have have come to an arrangement regarding the development of the Narmi project for EAB.
From Today I have agreed to a hand over of the project in Lieu of Zetr0's UNI commitments and lack of free time, I'm sure you wouldn't want our Bearded Crusader to spend less time on EAB!!
I hope to receieve the Handover pack in the next couple of weeks & will be then able to assess where everything stands.
I hope you are all happy with the arrangement & I will do my best to complete the project as originally envisaged.

Will Post Updates as they occour.

TC

Zetr0 · 25 September 2008, 22:11

@TC

Thank you my friend, I cannot think of anyone else to take on this project,

As some of you know, I am back at University, alas this has totally crippled my time this year for near enough ALL of my little side project. However, you all deserve to see and have a completed product, thats where our good friend TC has come in, rather gallently actually, to take up the calling.

I would like to thank every one here that has support me with encouragement and help, you guys are awesome!!!!

I know that you will support our TC in the same endevor

I will chip in and help out as much as I can, but please dont badger TC to hard, he has some catching up to do

Fingerlickin_B · 26 September 2008, 00:49

Great news, great work by all involved to date & in the future!

PZ.

Flashlab · 29 September 2008, 21:14

Hope to see a Narmi close to me soon!

Fingerlickin_B · 30 November 2008, 23:57

Any news TC?

PZ.

TheCorfiot · 02 December 2008, 10:21

@fingers , and all

Just awaiting final schematics from Zetro so I can start testing the design.

Will update as soon as I have news

TC

Fingerlickin_B · 02 December 2008, 10:45

PZ.

Paul_s · 02 December 2008, 13:35

Quote:

Originally Posted by TheCorfiot

Hello all
Just a quick Announcement
Zetro & I have have come to an arrangement regarding the development of the Narmi project for EAB.

This is on a grand scale of being Magna Carta MkII!

JackTheKnife · 03 December 2008, 19:09

Is it possible to put an order for NTSC version of that adaptor? Thanks

amigamaniac · 07 December 2008, 03:15

Hi all,

I have been reading this thread with some interest :-) I notice that this project has been floating around for a while, yet there doesn't seem to be a working model for sale? I liked Zetr0's PAL/NTSC version with a switch, but I would have liked it to have the 23 PIN connector to plug it straight into the Amiga's video port :-( A chopped 25 pin connector would do the job, as the PCB mountable 23 pin D-Subs don't seem to exist :-( An angle grinder would do it fairly neatly I would think, with a thin disc. Hmmmm...I only wish that I was around before, I would have loved to take over this project. If that model of Zetr0's with the PAL/NTSC switch works, I could have had them made and ready for sale in 1-2 months methinks.

*EDIT* On second thought, the design is good as it is. That way it can be used on other applications besides the Amiga. Plus the female 23 pin d-subs still exist. With a suitable cable (either IDC or a round shielded data cable), it could easily be plugged into the Amiga's video port, or something else non-Amiga.

What is happening with it? Was Zetr0's last design tested?

Nathan

JackTheKnife · 07 December 2008, 05:33

Do it, Nathan.

As I mention before (an e-mail) I will be first person on the list to buy it, even PCB only (external or internal version).

Zetr0 · 07 December 2008, 14:55

@Nathan,

my friend, i can send your all the schematics I have if that helps, I will incude one here as well to make sense of the ntsc/pal swtichin circuit

I had only a few momnets to test my initial unit, with this I have concluded that the lack of power is at fault. although TC is also testing this theory out as well may other areas too.

I really have next to no time on any project at the moment :* I do hope i get a couple of weeks of sanity of christmass break we shall see..

heres the switching circuit.

hope that helps.

JackTheKnife · 01 January 2009, 19:45

I bought this http://cgi.ebay.com/ws/eBayISAPI.dll...m=310111127271 but that adaptor has 2 input connectors - 5 and 6 pins. According to the manual 6-pin connector has R,G,B,GND,H,V and 5-pin connector has R,G,B,GND,S. Which one I should to connect and where on Amiga 500 rev.5?

Stedy · 02 January 2009, 19:03

@Zetro,

You may not require the 15pF capacitor for the PAL subcarrier oscillator circuit.
The device contributes 7pF + PCB trace should be enough, page 12 of the AD724 datasheet also states this.

Don't know if this is elsewhere in the schematic but you need 75 ohm resistors from signal to ground on the RGB inputs and AC couple the video signals into the device.

If you have full schematics, I will happily review them for you.

Ian

JackTheKnife · 03 January 2009, 05:12

Quote:

Originally Posted by JackTheKnife

I bought this http://cgi.ebay.com/ws/eBayISAPI.dll...m=310111127271 but that adaptor has 2 input connectors - 5 and 6 pins. According to the manual 6-pin connector has R,G,B,GND,H,V and 5-pin connector has R,G,B,GND,S. Which one I should to connect and where on Amiga 500 rev.5?

Any tips? Any help would be really appreciated

Vars191 · 03 January 2009, 05:29

Ok I have used this one on Amiga, you use the 5 pin, do you have a amiga 23pin vdeo lead and what is it go to, din or db9?

BlueAchenar · 03 January 2009, 06:00

Quote:

Originally Posted by JackTheKnife

Any tips? Any help would be really appreciated

I use exactly the same one. Just use the 5 pin connection.

Zetr0 · 03 January 2009, 14:41

@Steadylicious

Thanks for havin' a look

Quote:

Originally Posted by Stedy

@Zetro,

You may not require the 15pF capacitor for the PAL subcarrier oscillator circuit.
The device contributes 7pF + PCB trace should be enough, page 12 of the AD724 datasheet also states this.

Indeed, I missed this, well this save a component

.... ah yes.... page 12... i think I got page 9...10...11....zzzzZZZzz

honestly I completely missed it, thanks for the catch! (and review)

Quote:

Originally Posted by Stedy

Don't know if this is elsewhere in the schematic but you need 75 ohm resistors from signal to ground on the RGB inputs and AC couple the video signals into the device.

If you have full schematics, I will happily review them for you.

Ian

I do have full schematics and PCB layouts here and on the net so I shall post them for your purusal with a HUGE thanks from me

.

the above schema was to denote the choice of colour signal carrier, the full schema included the 75ohm pull on the RGB and 220UF cleaning on the Luma / Chroma and Comp.

after din dins I shall PM you some links and stuff.

I really apprciate your eyes on this.

JackTheKnife · 03 January 2009, 20:37

Quote:

Originally Posted by BlueAchenar

I use exactly the same one. Just use the 5 pin connection.

OK, but where I need to solder those wires on A500 rev.5 PCB?

I saw that Youtube A1000 SVideo hack but A500 has different PCB

Zetr0 · 14 January 2009, 03:23

Just adding a full schematic to the thread

hope that helps.

25 September 2008, 17:10	#201
TheCorfiot Amibay Senior Staff Join Date: Feb 2008 Location: Cardiff / Wales Posts: 1,302	Narmi EAB Project Update Hello all Just a quick Announcement Zetro & I have have come to an arrangement regarding the development of the Narmi project for EAB. From Today I have agreed to a hand over of the project in Lieu of Zetr0's UNI commitments and lack of free time, I'm sure you wouldn't want our Bearded Crusader to spend less time on EAB!! I hope to receieve the Handover pack in the next couple of weeks & will be then able to assess where everything stands. I hope you are all happy with the arrangement & I will do my best to complete the project as originally envisaged. Will Post Updates as they occour. TC

07 December 2008, 03:15	#210
amigamaniac Registered User Join Date: Sep 2008 Location: Sydney metro, Australia Age: 44 Posts: 124	Very interesting project indeed! Hi all, I have been reading this thread with some interest :-) I notice that this project has been floating around for a while, yet there doesn't seem to be a working model for sale? I liked Zetr0's PAL/NTSC version with a switch, but I would have liked it to have the 23 PIN connector to plug it straight into the Amiga's video port :-( A chopped 25 pin connector would do the job, as the PCB mountable 23 pin D-Subs don't seem to exist :-( An angle grinder would do it fairly neatly I would think, with a thin disc. Hmmmm...I only wish that I was around before, I would have loved to take over this project. If that model of Zetr0's with the PAL/NTSC switch works, I could have had them made and ready for sale in 1-2 months methinks. EDIT On second thought, the design is good as it is. That way it can be used on other applications besides the Amiga. Plus the female 23 pin d-subs still exist. With a suitable cable (either IDC or a round shielded data cable), it could easily be plugged into the Amiga's video port, or something else non-Amiga. What is happening with it? Was Zetr0's last design tested? Nathan Last edited by amigamaniac; 07 December 2008 at 03:20. Reason: Changed my mind :-P

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25 September 2008, 22:11	#202
Zetr0 Ya' like it Retr0? Join Date: Jul 2005 Location: United Kingdom Age: 49 Posts: 9,768	@TC Thank you my friend, I cannot think of anyone else to take on this project, As some of you know, I am back at University, alas this has totally crippled my time this year for near enough ALL of my little side project. However, you all deserve to see and have a completed product, thats where our good friend TC has come in, rather gallently actually, to take up the calling. I would like to thank every one here that has support me with encouragement and help, you guys are awesome!!!! I know that you will support our TC in the same endevor I will chip in and help out as much as I can, but please dont badger TC to hard, he has some catching up to do

26 September 2008, 00:49	#203
Fingerlickin_B Amiga Nut Join Date: Oct 2006 Location: Belco, Australia Posts: 2,242	Great news, great work by all involved to date & in the future! PZ.

29 September 2008, 21:14	#204
Flashlab Registered User Join Date: Sep 2005 Location: Netherlands Posts: 158	Hope to see a Narmi close to me soon!

30 November 2008, 23:57	#205
Fingerlickin_B Amiga Nut Join Date: Oct 2006 Location: Belco, Australia Posts: 2,242	Any news TC? PZ.

02 December 2008, 10:21	#206
TheCorfiot Amibay Senior Staff Join Date: Feb 2008 Location: Cardiff / Wales Posts: 1,302	@fingers , and all Just awaiting final schematics from Zetro so I can start testing the design. Will update as soon as I have news TC

02 December 2008, 10:45	#207
Fingerlickin_B Amiga Nut Join Date: Oct 2006 Location: Belco, Australia Posts: 2,242	PZ.

03 December 2008, 19:09	#209
JackTheKnife Amiga Fetish Join Date: Dec 2008 Location: Downstate NY Age: 49 Posts: 267	Is it possible to put an order for NTSC version of that adaptor? Thanks

07 December 2008, 05:33	#211
JackTheKnife Amiga Fetish Join Date: Dec 2008 Location: Downstate NY Age: 49 Posts: 267	Do it, Nathan. As I mention before (an e-mail) I will be first person on the list to buy it, even PCB only (external or internal version).

07 December 2008, 14:55	#212
Zetr0 Ya' like it Retr0? Join Date: Jul 2005 Location: United Kingdom Age: 49 Posts: 9,768	@Nathan, my friend, i can send your all the schematics I have if that helps, I will incude one here as well to make sense of the ntsc/pal swtichin circuit I had only a few momnets to test my initial unit, with this I have concluded that the lack of power is at fault. although TC is also testing this theory out as well may other areas too. I really have next to no time on any project at the moment :* I do hope i get a couple of weeks of sanity of christmass break we shall see.. heres the switching circuit. hope that helps.

01 January 2009, 19:45	#213
JackTheKnife Amiga Fetish Join Date: Dec 2008 Location: Downstate NY Age: 49 Posts: 267	I bought this http://cgi.ebay.com/ws/eBayISAPI.dll...m=310111127271 but that adaptor has 2 input connectors - 5 and 6 pins. According to the manual 6-pin connector has R,G,B,GND,H,V and 5-pin connector has R,G,B,GND,S. Which one I should to connect and where on Amiga 500 rev.5?

02 January 2009, 19:03	#214
Stedy Registered User Join Date: Jan 2008 Location: United Kingdom Age: 46 Posts: 733	@Zetro, You may not require the 15pF capacitor for the PAL subcarrier oscillator circuit. The device contributes 7pF + PCB trace should be enough, page 12 of the AD724 datasheet also states this. Don't know if this is elsewhere in the schematic but you need 75 ohm resistors from signal to ground on the RGB inputs and AC couple the video signals into the device. If you have full schematics, I will happily review them for you. Ian

03 January 2009, 05:29	#216
Vars191 The Red Baron Rides Again Join Date: Apr 2008 Location: Brisbane Australia Posts: 324	Ok I have used this one on Amiga, you use the 5 pin, do you have a amiga 23pin vdeo lead and what is it go to, din or db9?

14 January 2009, 03:23	#220
Zetr0 Ya' like it Retr0? Join Date: Jul 2005 Location: United Kingdom Age: 49 Posts: 9,768	Just adding a full schematic to the thread hope that helps.

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