TS2068 RGB
14 messages · 2016-04-06 → 2016-10-08 · Yahoo Group era · View archive on archive.org
Participants: Eduardo Fuentes, Richard Burt, rjburt56
Attachments in thread: 5 (see the archive.org item)
Preserved from the Timex/Sinclair 2068 Yahoo Group (2001–2019), which is no longer online. Text reproduced from the archive.org archive; email addresses masked.
Messages
1. TS2068 RGB
rjburt56 · 06 Apr 2016 13:37:03 -
Hi to all.
I have a RGB interface unit made by a John Mathewson in the late 80ts, I have been using it on a QL monitor which worked very well. I no longer have the QL or the QL monitor, I have been using my TS2068 on a 19" Sharp LCD TV with composite video input, but the display is not great, with the usual display problems.
Also on the the TV there is a 15 pin input that is for ANALOG RGB ( PC IN ). I would like to know if I can wire my RGB interface to this TV? The wiring on the interface are as follows.
1. White wire to Composite or Horizontal Synch Pin
2. Brown wire to Vertical Synch Pin
3. Braided wire to Ground Pin
4. Red wire to Red Pin
5. Green wire to Green Pin
6. Blue wire to Blue Pin
Technical notes of Interface.
1. Both the horizontal and the vertical synch signals are negative - going, and are at TTL levels. Make sure that your monitor / tv is set up to accept synch signals with these characteristics.
2. The RGB signals from the TS2068 are TTL digital and only TTL RGB digital monitors will work with this computer. RGB Analog monitors may also work depending on wheter the RGB signal levels fall into the required range for the drive to the RGB guns.
I got this interface to function on the QL monitor OK, had to do some fine tuning inside the TS2068 and was hoping to get it to work on this TV.
I am looking for advise or opinions if this will work? My biggest worry is, can I damage my TS2068?
I have a 15 pin monitor cable and plugged it into a older laptop that I have, and selected the input for the PC in on the TV and turned on the laptop and it came on OK and started to load windows XP until the desk top display came up on the laptop, and then the display quit on the TV? then the battery gave up and I had to shut it down, will try with the power supply and see what happens.
Any help would be muchly appreciated. Thanks in advance.
Richard
PS: I have not done the voltage regulator change as I have gotten use to it.
2. Re: [ts2068] TS2068 RGB
Eduardo Fuentes · Mon, 11 Apr 2016 04:43
Hi Richard,You have to convert TTL RGB to analog RGB.There is a different horizontal sync between VGA and your computer. TS-2068 is 15 KHZ and VGA is 31 KHz.May be your TV accept 15KHz analog RGB signals through VGA connector.Respect to the sync you have to try. Remember to adapt the signal level to comply VGA standards. Sometime composite sync can be connected to Horizontal sync at VGA connector. You can always use an inverter (74LS04 to change sync polarity before adapt the level.
Regards,Eduardo.
De: "[email] [ts2068]" <[email]>
Para: [email]
Enviado: Miércoles, 6 de abril, 2016 17:37:03
Asunto: [ts2068] TS2068 RGB
Hi to all.
I have a RGB interface unit made by a John Mathewson in the late 80ts, I have been using it on a QL monitor which worked very well. I no longer have the QL or the QL monitor, I have been using my TS2068 on a 19" Sharp LCD TV with composite video input, but the display is not great, with the usual display problems.
Also on the the TV there is a 15 pin input that is for ANALOG RGB ( PC IN ). I would like to know if I can wire my RGB interface to this TV? The wiring on the interface are as follows.
1. White wire to Composite or Horizontal Synch Pin
2. Brown wire to Vertical Synch Pin
3. Braided wire to Ground Pin
4. Red wire to Red Pin
5. Green wire to Green Pin
6. Blue wire to Blue Pin
Technical notes of Interface.
1. Both the horizontal and the vertical synch signals are negative - going, and are at TTL levels. Make sure that your monitor / tv is set up to accept synch signals with these characteristics.
2. The RGB signals from the TS2068 are TTL digital and only TTL RGB digital monitors will work with this computer. RGB Analog monitors may also work depending on wheter the RGB signal levels fall into the required range for the drive to the RGB guns.
I got this interface to function on the QL monitor OK, had to do some fine tuning inside the TS2068 and was hoping to get it to work on this TV.
I am looking for advise or opinions if this will work? My biggest worry is, can I damage my TS2068?
I have a 15 pin monitor cable and plugged it into a older laptop that I have, and selected the input for the PC in on the TV and turned on the laptop and it came on OK and started to load windows XP until the desk top display came up on the laptop, and then the display quit on the TV? then the battery gave up and I had to shut it down, will try with the power supply and see what happens.
Any help would be muchly appreciated. Thanks in advance.
Richard
PS: I have not done the voltage regulator change as I have gotten use to it.
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3. Re: [ts2068] TS2068 RGB
Richard Burt · Mon, 11 Apr 2016 18:15
Hi Eduardo.Thank you for your reply. On the back of the TV there is a input that is for ANALOG RGB and in brackets ( PC IN ). The connector is a 15 pin D and a 15 pin monitor cable fits in it. I have tried a older laptop running XP, with a monitor output connected up to it and I believe that the laptop is VGA, and I get some display on boot up only, after the desktop displays I get nothing on the TV, I believe that the display goes to VGA then. I had my TS2068 working on my QL Vision monitor, and I still have the DIN connector on the wires coming from the RGB interface that I have. I am not a electronic whiz, but I can follow wiring diagrams reasonably well, I would like to try and connect it up but I am unsure of the pin assignments for the D-15, any help here would be muchly appreciated. I have looked at the group files and the subject of RGB , and find it a little confusing. Can you help me out? Thanks.
Regards.
Richard
On Monday, April 11, 2016 1:08 AM, "Eduardo Fuentes [email] [ts2068]" <[email]> wrote:
Hi Richard,You have to convert TTL RGB to analog RGB.There is a different horizontal sync between VGA and your computer. TS-2068 is 15 KHZ and VGA is 31 KHz.May be your TV accept 15KHz analog RGB signals through VGA connector.Respect to the sync you have to try. Remember to adapt the signal level to comply VGA standards. Sometime composite sync can be connected to Horizontal sync at VGA connector. You can always use an inverter (74LS04 to change sync polarity before adapt the level.
Regards,Eduardo.
De: "[email] [ts2068]" <[email]>
Para: [email]
Enviado: Miércoles, 6 de abril, 2016 17:37:03
Asunto: [ts2068] TS2068 RGB
Hi to all.
I have a RGB interface unit made by a John Mathewson in the late 80ts, I have been using it on a QL monitor which worked very well. I no longer have the QL or the QL monitor, I have been using my TS2068 on a 19" Sharp LCD TV with composite video input, but the display is not great, with the usual display problems.
Also on the the TV there is a 15 pin input that is for ANALOG RGB ( PC IN ). I would like to know if I can wire my RGB interface to this TV? The wiring on the interface are as follows.
1. White wire to Composite or Horizontal Synch Pin
2. Brown wire to Vertical Synch Pin
3. Braided wire to Ground Pin
4. Red wire to Red Pin
5. Green wire to Green Pin
6. Blue wire to Blue Pin
Technical notes of Interface.
1. Both the horizontal and the vertical synch signals are negative - going, and are at TTL levels. Make sure that your monitor / tv is set up to accept synch signals with these characteristics.
2. The RGB signals from the TS2068 are TTL digital and only TTL RGB digital monitors will work with this computer. RGB Analog monitors may also work depending on wheter the RGB signal levels fall into the required range for the drive to the RGB guns.
I got this interface to function on the QL monitor OK, had to do some fine tuning inside the TS2068 and was hoping to get it to work on this TV.
I am looking for advise or opinions if this will work? My biggest worry is, can I damage my TS2068?
I have a 15 pin monitor cable and plugged it into a older laptop that I have, and selected the input for the PC in on the TV and turned on the laptop and it came on OK and started to load windows XP until the desk top display came up on the laptop, and then the display quit on the TV? then the battery gave up and I had to shut it down, will try with the power supply and see what happens.
Any help would be muchly appreciated. Thanks in advance.
Richard
PS: I have not done the voltage regulator change as I have gotten use to it.
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4. Re: [ts2068] TS2068 RGB
Eduardo Fuentes · Tue, 12 Apr 2016 13:57 · 📎 1: file
Hi Richard,
The first thing you must do is to adapt TTL RGB signal level to analog RGB.TTL RGB is 5V and analog RGB is 0.7Vpp/1Vpp. If your TV don't have explicit support for TTL RGB do not connect your TS-2068 before signal level adaptation.Attached is a signal level converter for RGBI to analog. You can google a little for others.As I know your RGB adapter do not have Intensity (no bright colors) and you can eliminate all components for "I" signal or wire it to 5V or 0V to have all bright or all normal colors.
Composite sync signal TTL levels are OK for VGA.
Respect to pin assignments:
ANALOG R from your interface to VGA pin 1ANALOG G from your interface to VGA pin 2ANALOG B from your interface to VGA pin 3GND of your interface to VGA pins 5,6,7,8,10TTL Composite Sync from your interface to VGA pin 13.
You only will see image if your TV's VGA input supports 15KHz horizontal frequency.
If you don't want to worry to about circuits, signal levels, etc. You can buy a scandoubler, I have a "GBS8220 CGA EGA yPbPr to 2 vga". I buyed it for $55 with shipping to Argentina (Aliexpress) some time ago. I'm pretty sure it will handle positive/negative syncs signals automatically.This adapter is a direct bridge from your RGB interface and any VGA/TV with VGA input
Regards,Eduardo.
De: "Richard Burt [email] [ts2068]" <[email]>
Para: "[email]" <[email]>
Enviado: Lunes, 11 de abril, 2016 15:15:33
Asunto: Re: [ts2068] TS2068 RGB
Hi Eduardo.Thank you for your reply. On the back of the TV there is a input that is for ANALOG RGB and in brackets ( PC IN ). The connector is a 15 pin D and a 15 pin monitor cable fits in it. I have tried a older laptop running XP, with a monitor output connected up to it and I believe that the laptop is VGA, and I get some display on boot up only, after the desktop displays I get nothing on the TV, I believe that the display goes to VGA then. I had my TS2068 working on my QL Vision monitor, and I still have the DIN connector on the wires coming from the RGB interface that I have. I am not a electronic whiz, but I can follow wiring diagrams reasonably well, I would like to try and connect it up but I am unsure of the pin assignments for the D-15, any help here would be muchly appreciated. I have looked at the group files and the subject of RGB , and find it a little confusing. Can you help me out? Thanks.
Regards.
Richard
On Monday, April 11, 2016 1:08 AM, "Eduardo Fuentes [email] [ts2068]" <[email]> wrote:
Hi Richard,You have to convert TTL RGB to analog RGB.There is a different horizontal sync between VGA and your computer. TS-2068 is 15 KHZ and VGA is 31 KHz.May be your TV accept 15KHz analog RGB signals through VGA connector.Respect to the sync you have to try. Remember to adapt the signal level to comply VGA standards. Sometime composite sync can be connected to Horizontal sync at VGA connector. You can always use an inverter (74LS04 to change sync polarity before adapt the level.
Regards,Eduardo.
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5. Re: [ts2068] TS2068 RGB [1 Attachment]
Richard Burt · Tue, 12 Apr 2016 20:48
Hi Eduardo.Thank you so much for your assistance, I can build this adapter. The [R]/ 470 OHM/50% with the arrow back to the resistor, is this a Variable resistor set to 50%? Since my RGB interface does not have a Intensity connection, I just have to eliminate all of it? The 75 ohm resistors shown as R in TV scart, are these connected inside the TV? or Do they have to be added inside the TV? Thanks.
Regards.
Richard
On Tuesday, April 12, 2016 10:08 AM, "Eduardo Fuentes [email] [ts2068]" <[email]> wrote:
[Attachment(s) from Eduardo Fuentes included below] Hi Richard,
The first thing you must do is to adapt TTL RGB signal level to analog RGB.TTL RGB is 5V and analog RGB is 0.7Vpp/1Vpp. If your TV don't have explicit support for TTL RGB do not connect your TS-2068 before signal level adaptation.Attached is a signal level converter for RGBI to analog. You can google a little for others.As I know your RGB adapter do not have Intensity (no bright colors) and you can eliminate all components for "I" signal or wire it to 5V or 0V to have all bright or all normal colors.
Composite sync signal TTL levels are OK for VGA.
Respect to pin assignments:
ANALOG R from your interface to VGA pin 1ANALOG G from your interface to VGA pin 2ANALOG B from your interface to VGA pin 3GND of your interface to VGA pins 5,6,7,8,10TTL Composite Sync from your interface to VGA pin 13.
You only will see image if your TV's VGA input supports 15KHz horizontal frequency.
If you don't want to worry to about circuits, signal levels, etc. You can buy a scandoubler, I have a "GBS8220 CGA EGA yPbPr to 2 vga". I buyed it for $55 with shipping to Argentina (Aliexpress) some time ago. I'm pretty sure it will handle positive/negative syncs signals automatically.This adapter is a direct bridge from your RGB interface and any VGA/TV with VGA input
Regards,Eduardo.
De: "Richard Burt [email] [ts2068]" <[email]>
Para: "[email]" <[email]>
Enviado: Lunes, 11 de abril, 2016 15:15:33
Asunto: Re: [ts2068] TS2068 RGB
Hi Eduardo.Thank you for your reply. On the back of the TV there is a input that is for ANALOG RGB and in brackets ( PC IN ). The connector is a 15 pin D and a 15 pin monitor cable fits in it. I have tried a older laptop running XP, with a monitor output connected up to it and I believe that the laptop is VGA, and I get some display on boot up only, after the desktop displays I get nothing on the TV, I believe that the display goes to VGA then. I had my TS2068 working on my QL Vision monitor, and I still have the DIN connector on the wires coming from the RGB interface that I have. I am not a electronic whiz, but I can follow wiring diagrams reasonably well, I would like to try and connect it up but I am unsure of the pin assignments for the D-15, any help here would be muchly appreciated. I have looked at the group files and the subject of RGB , and find it a little confusing. Can you help me out? Thanks.
Regards.
Richard
On Monday, April 11, 2016 1:08 AM, "Eduardo Fuentes [email] [ts2068]" <[email]> wrote:
Hi Richard,You have to convert TTL RGB to analog RGB.There is a different horizontal sync between VGA and your computer. TS-2068 is 15 KHZ and VGA is 31 KHz.May be your TV accept 15KHz analog RGB signals through VGA connector.Respect to the sync you have to try. Remember to adapt the signal level to comply VGA standards. Sometime composite sync can be connected to Horizontal sync at VGA connector. You can always use an inverter (74LS04 to change sync polarity before adapt the level.
Regards,Eduardo.
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6. Re: [ts2068] TS2068 RGB
Eduardo Fuentes · Wed, 13 Apr 2016 02:09
Hi Richard.The 470 ohm is a trim potentiometer. It can initially set to middle position (50%), they control the bright of each color.Remove I connection is optional, if you opt to leave it you can wire it to 5V (bright colors) or GND (normal colors). If you opt to not add I signal you will have only normal colors.75 ohm resistor are inside SCART connectors. For VGA I don't know if they must be added. You can try with resistors added first and remove them if you have colors too dark.
You are welcome.
Regards,Eduardo.PS: Thinking about your laptop, may be you have to set the external monitor with the function keys once windows is running. May be the resolution/refresh rate are outside your TV specs.
De: "Richard Burt [email] [ts2068]" <[email]>
Para: "[email]" <[email]>
Enviado: Martes, 12 de abril, 2016 17:48:31
Asunto: Re: [ts2068] TS2068 RGB
Hi Eduardo.Thank you so much for your assistance, I can build this adapter. The [R]/ 470 OHM/50% with the arrow back to the resistor, is this a Variable resistor set to 50%? Since my RGB interface does not have a Intensity connection, I just have to eliminate all of it? The 75 ohm resistors shown as R in TV scart, are these connected inside the TV? or Do they have to be added inside the TV? Thanks.
Regards.
Richard
On Tuesday, April 12, 2016 10:08 AM, "Eduardo Fuentes [email] [ts2068]" <[email]> wrote:
[Attachment(s) from Eduardo Fuentes included below] Hi Richard,
The first thing you must do is to adapt TTL RGB signal level to analog RGB.TTL RGB is 5V and analog RGB is 0.7Vpp/1Vpp. If your TV don't have explicit support for TTL RGB do not connect your TS-2068 before signal level adaptation.Attached is a signal level converter for RGBI to analog. You can google a little for others.As I know your RGB adapter do not have Intensity (no bright colors) and you can eliminate all components for "I" signal or wire it to 5V or 0V to have all bright or all normal colors.
Composite sync signal TTL levels are OK for VGA.
Respect to pin assignments:
ANALOG R from your interface to VGA pin 1ANALOG G from your interface to VGA pin 2ANALOG B from your interface to VGA pin 3GND of your interface to VGA pins 5,6,7,8,10TTL Composite Sync from your interface to VGA pin 13.
You only will see image if your TV's VGA input supports 15KHz horizontal frequency.
If you don't want to worry to about circuits, signal levels, etc. You can buy a scandoubler, I have a "GBS8220 CGA EGA yPbPr to 2 vga". I buyed it for $55 with shipping to Argentina (Aliexpress) some time ago. I'm pretty sure it will handle positive/negative syncs signals automatically.This adapter is a direct bridge from your RGB interface and any VGA/TV with VGA input
Regards,Eduardo.
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7. Re: [ts2068] TS2068 RGB
Richard Burt · Wed, 13 Apr 2016 03:32
Hi Eduardo.I cannot locate any 470 Ohm trimpots from my suppliers. Will 500 Ohm trimpots be OK? Dose the 3 third leg of the trimpots need to be in the loop? or Is this just the way of indicating it is a variable resistor? Since my RGB interface does not have a Intensity I will try include it later. Both the Composite / Horizontal and Vertical synch signals are negative - going and are at TTL levels. Is this normal for most TV or Monitors? Or am I going to have to change this also? I am still concerned about the 75 Ohm resistors in TV, since my TV RGB in is Analog I can't see them being needed. What are your thoughts? Thanks.Regards.
Richard
On Tuesday, April 12, 2016 10:14 PM, "Eduardo Fuentes [email] [ts2068]" <[email]> wrote:
Hi Richard.The 470 ohm is a trim potentiometer. It can initially set to middle position (50%), they control the bright of each color.Remove I connection is optional, if you opt to leave it you can wire it to 5V (bright colors) or GND (normal colors). If you opt to not add I signal you will have only normal colors.75 ohm resistor are inside SCART connectors. For VGA I don't know if they must be added. You can try with resistors added first and remove them if you have colors too dark.
You are welcome.
Regards,Eduardo.PS: Thinking about your laptop, may be you have to set the external monitor with the function keys once windows is running. May be the resolution/refresh rate are outside your TV specs.
De: "Richard Burt [email] [ts2068]" <[email]>
Para: "[email]" <[email]>
Enviado: Martes, 12 de abril, 2016 17:48:31
Asunto: Re: [ts2068] TS2068 RGB
Hi Eduardo.Thank you so much for your assistance, I can build this adapter. The [R]/ 470 OHM/50% with the arrow back to the resistor, is this a Variable resistor set to 50%? Since my RGB interface does not have a Intensity connection, I just have to eliminate all of it? The 75 ohm resistors shown as R in TV scart, are these connected inside the TV? or Do they have to be added inside the TV? Thanks.
Regards.
Richard
On Tuesday, April 12, 2016 10:08 AM, "Eduardo Fuentes [email] [ts2068]" <[email]> wrote:
[Attachment(s) from Eduardo Fuentes included below] Hi Richard,
The first thing you must do is to adapt TTL RGB signal level to analog RGB.TTL RGB is 5V and analog RGB is 0.7Vpp/1Vpp. If your TV don't have explicit support for TTL RGB do not connect your TS-2068 before signal level adaptation.Attached is a signal level converter for RGBI to analog. You can google a little for others.As I know your RGB adapter do not have Intensity (no bright colors) and you can eliminate all components for "I" signal or wire it to 5V or 0V to have all bright or all normal colors.
Composite sync signal TTL levels are OK for VGA.
Respect to pin assignments:
ANALOG R from your interface to VGA pin 1ANALOG G from your interface to VGA pin 2ANALOG B from your interface to VGA pin 3GND of your interface to VGA pins 5,6,7,8,10TTL Composite Sync from your interface to VGA pin 13.
You only will see image if your TV's VGA input supports 15KHz horizontal frequency.
If you don't want to worry to about circuits, signal levels, etc. You can buy a scandoubler, I have a "GBS8220 CGA EGA yPbPr to 2 vga". I buyed it for $55 with shipping to Argentina (Aliexpress) some time ago. I'm pretty sure it will handle positive/negative syncs signals automatically.This adapter is a direct bridge from your RGB interface and any VGA/TV with VGA input
Regards,Eduardo.
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8. Re: [ts2068] TS2068 RGB
Eduardo Fuentes · Wed, 13 Apr 2016 07:24 · 📎 1: file
Hi Richard.The pots don't have to be the ones with screw, you can use the little ones, see attached image.500 ohm will be ok, but 470 ohm are very common. They are used as a variable resistor.As an example the pot connection for R signalLeft leg to the joint of "R" and left leg of 22pf capacitor.Middle and right legs to the 560 ohm resistor.You don't have to add extra 75 ohm resistors. VGA impedance is 75 ohm, thanks google ;-).TTL Negative sync will be ok.
Regards,Eduardo.
De: "Richard Burt [email] [ts2068]" <[email]>
Para: "[email]" <[email]>
Enviado: Miércoles, 13 de abril, 2016 0:32:25
Asunto: Re: [ts2068] TS2068 RGB
Hi Eduardo.I cannot locate any 470 Ohm trimpots from my suppliers. Will 500 Ohm trimpots be OK? Dose the 3 third leg of the trimpots need to be in the loop? or Is this just the way of indicating it is a variable resistor? Since my RGB interface does not have a Intensity I will try include it later. Both the Composite / Horizontal and Vertical synch signals are negative - going and are at TTL levels. Is this normal for most TV or Monitors? Or am I going to have to change this also? I am still concerned about the 75 Ohm resistors in TV, since my TV RGB in is Analog I can't see them being needed. What are your thoughts? Thanks.Regards.
Richard
On Tuesday, April 12, 2016 10:14 PM, "Eduardo Fuentes [email] [ts2068]" <[email]> wrote:
Hi Richard.The 470 ohm is a trim potentiometer. It can initially set to middle position (50%), they control the bright of each color.Remove I connection is optional, if you opt to leave it you can wire it to 5V (bright colors) or GND (normal colors). If you opt to not add I signal you will have only normal colors.75 ohm resistor are inside SCART connectors. For VGA I don't know if they must be added. You can try with resistors added first and remove them if you have colors too dark.
You are welcome.
Regards,Eduardo.PS: Thinking about your laptop, may be you have to set the external monitor with the function keys once windows is running. May be the resolution/refresh rate are outside your TV specs.
De: "Richard Burt [email] [ts2068]" <[email]>
Para: "[email]" <[email]>
Enviado: Martes, 12 de abril, 2016 17:48:31
Asunto: Re: [ts2068] TS2068 RGB
Hi Eduardo.Thank you so much for your assistance, I can build this adapter. The [R]/ 470 OHM/50% with the arrow back to the resistor, is this a Variable resistor set to 50%? Since my RGB interface does not have a Intensity connection, I just have to eliminate all of it? The 75 ohm resistors shown as R in TV scart, are these connected inside the TV? or Do they have to be added inside the TV? Thanks.
Regards.
Richard
On Tuesday, April 12, 2016 10:08 AM, "Eduardo Fuentes [email] [ts2068]" <[email]> wrote:
[Attachment(s) from Eduardo Fuentes included below] Hi Richard,
The first thing you must do is to adapt TTL RGB signal level to analog RGB.TTL RGB is 5V and analog RGB is 0.7Vpp/1Vpp. If your TV don't have explicit support for TTL RGB do not connect your TS-2068 before signal level adaptation.Attached is a signal level converter for RGBI to analog. You can google a little for others.As I know your RGB adapter do not have Intensity (no bright colors) and you can eliminate all components for "I" signal or wire it to 5V or 0V to have all bright or all normal colors.
Composite sync signal TTL levels are OK for VGA.
Respect to pin assignments:
ANALOG R from your interface to VGA pin 1ANALOG G from your interface to VGA pin 2ANALOG B from your interface to VGA pin 3GND of your interface to VGA pins 5,6,7,8,10TTL Composite Sync from your interface to VGA pin 13.
You only will see image if your TV's VGA input supports 15KHz horizontal frequency.
If you don't want to worry to about circuits, signal levels, etc. You can buy a scandoubler, I have a "GBS8220 CGA EGA yPbPr to 2 vga". I buyed it for $55 with shipping to Argentina (Aliexpress) some time ago. I'm pretty sure it will handle positive/negative syncs signals automatically.This adapter is a direct bridge from your RGB interface and any VGA/TV with VGA input
Regards,Eduardo.
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9. Re: [ts2068] TS2068 RGB [1 Attachment]
Richard Burt · Wed, 13 Apr 2016 21:41 · 📎 1: file
Hi Eduardo.Thank you so much again, I will email you back when I have the circuit completed. I am including a picture of the trimpots that my supplier has in stock. I can test the circuit for proper voltage readings before I attach it to the TV. Take care.Regards.
Richard
On Wednesday, April 13, 2016 3:24 AM, "Eduardo Fuentes [email] [ts2068]" <[email]> wrote:
[Attachment(s) from Eduardo Fuentes included below] Hi Richard.The pots don't have to be the ones with screw, you can use the little ones, see attached image.500 ohm will be ok, but 470 ohm are very common. They are used as a variable resistor.As an example the pot connection for R signalLeft leg to the joint of "R" and left leg of 22pf capacitor.Middle and right legs to the 560 ohm resistor.You don't have to add extra 75 ohm resistors. VGA impedance is 75 ohm, thanks google ;-).TTL Negative sync will be ok.
Regards,Eduardo.
De: "Richard Burt [email] [ts2068]" <[email]>
Para: "[email]" <[email]>
Enviado: Miércoles, 13 de abril, 2016 0:32:25
Asunto: Re: [ts2068] TS2068 RGB
Hi Eduardo.I cannot locate any 470 Ohm trimpots from my suppliers. Will 500 Ohm trimpots be OK? Dose the 3 third leg of the trimpots need to be in the loop? or Is this just the way of indicating it is a variable resistor? Since my RGB interface does not have a Intensity I will try include it later. Both the Composite / Horizontal and Vertical synch signals are negative - going and are at TTL levels. Is this normal for most TV or Monitors? Or am I going to have to change this also? I am still concerned about the 75 Ohm resistors in TV, since my TV RGB in is Analog I can't see them being needed. What are your thoughts? Thanks.Regards.
Richard
On Tuesday, April 12, 2016 10:14 PM, "Eduardo Fuentes [email] [ts2068]" <[email]> wrote:
Hi Richard.The 470 ohm is a trim potentiometer. It can initially set to middle position (50%), they control the bright of each color.Remove I connection is optional, if you opt to leave it you can wire it to 5V (bright colors) or GND (normal colors). If you opt to not add I signal you will have only normal colors.75 ohm resistor are inside SCART connectors. For VGA I don't know if they must be added. You can try with resistors added first and remove them if you have colors too dark.
You are welcome.
Regards,Eduardo.PS: Thinking about your laptop, may be you have to set the external monitor with the function keys once windows is running. May be the resolution/refresh rate are outside your TV specs.
De: "Richard Burt [email] [ts2068]" <[email]>
Para: "[email]" <[email]>
Enviado: Martes, 12 de abril, 2016 17:48:31
Asunto: Re: [ts2068] TS2068 RGB
Hi Eduardo.Thank you so much for your assistance, I can build this adapter. The [R]/ 470 OHM/50% with the arrow back to the resistor, is this a Variable resistor set to 50%? Since my RGB interface does not have a Intensity connection, I just have to eliminate all of it? The 75 ohm resistors shown as R in TV scart, are these connected inside the TV? or Do they have to be added inside the TV? Thanks.
Regards.
Richard
On Tuesday, April 12, 2016 10:08 AM, "Eduardo Fuentes [email] [ts2068]" <[email]> wrote:
[Attachment(s) from Eduardo Fuentes included below] Hi Richard,
The first thing you must do is to adapt TTL RGB signal level to analog RGB.TTL RGB is 5V and analog RGB is 0.7Vpp/1Vpp. If your TV don't have explicit support for TTL RGB do not connect your TS-2068 before signal level adaptation.Attached is a signal level converter for RGBI to analog. You can google a little for others.As I know your RGB adapter do not have Intensity (no bright colors) and you can eliminate all components for "I" signal or wire it to 5V or 0V to have all bright or all normal colors.
Composite sync signal TTL levels are OK for VGA.
Respect to pin assignments:
ANALOG R from your interface to VGA pin 1ANALOG G from your interface to VGA pin 2ANALOG B from your interface to VGA pin 3GND of your interface to VGA pins 5,6,7,8,10TTL Composite Sync from your interface to VGA pin 13.
You only will see image if your TV's VGA input supports 15KHz horizontal frequency.
If you don't want to worry to about circuits, signal levels, etc. You can buy a scandoubler, I have a "GBS8220 CGA EGA yPbPr to 2 vga". I buyed it for $55 with shipping to Argentina (Aliexpress) some time ago. I'm pretty sure it will handle positive/negative syncs signals automatically.This adapter is a direct bridge from your RGB interface and any VGA/TV with VGA input
Regards,Eduardo.
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10. Re: [ts2068] TS2068 RGB [1 Attachment]
Richard Burt · Wed, 13 Apr 2016 21:59 · 📎 2: file, file
Hi Eduardo.My supplier emailed me and now has these [ see picture ] trimpots in stock. I have not ordered the parts yet, which ones would you use? Thanks.Regards.
Richard
On Wednesday, April 13, 2016 5:50 PM, "Richard Burt [email] [ts2068]" <[email]> wrote:
[Attachment(s) from Richard Burt included below] Hi Eduardo.Thank you so much again, I will email you back when I have the circuit completed. I am including a picture of the trimpots that my supplier has in stock. I can test the circuit for proper voltage readings before I attach it to the TV. Take care.Regards.
Richard
On Wednesday, April 13, 2016 3:24 AM, "Eduardo Fuentes [email] [ts2068]" <[email]> wrote:
[Attachment(s) from Eduardo Fuentes included below] Hi Richard.The pots don't have to be the ones with screw, you can use the little ones, see attached image.500 ohm will be ok, but 470 ohm are very common. They are used as a variable resistor.As an example the pot connection for R signalLeft leg to the joint of "R" and left leg of 22pf capacitor.Middle and right legs to the 560 ohm resistor.You don't have to add extra 75 ohm resistors. VGA impedance is 75 ohm, thanks google ;-).TTL Negative sync will be ok.
Regards,Eduardo.
De: "Richard Burt [email] [ts2068]" <[email]>
Para: "[email]" <[email]>
Enviado: Miércoles, 13 de abril, 2016 0:32:25
Asunto: Re: [ts2068] TS2068 RGB
Hi Eduardo.I cannot locate any 470 Ohm trimpots from my suppliers. Will 500 Ohm trimpots be OK? Dose the 3 third leg of the trimpots need to be in the loop? or Is this just the way of indicating it is a variable resistor? Since my RGB interface does not have a Intensity I will try include it later. Both the Composite / Horizontal and Vertical synch signals are negative - going and are at TTL levels. Is this normal for most TV or Monitors? Or am I going to have to change this also? I am still concerned about the 75 Ohm resistors in TV, since my TV RGB in is Analog I can't see them being needed. What are your thoughts? Thanks.Regards.
Richard
On Tuesday, April 12, 2016 10:14 PM, "Eduardo Fuentes [email] [ts2068]" <[email]> wrote:
Hi Richard.The 470 ohm is a trim potentiometer. It can initially set to middle position (50%), they control the bright of each color.Remove I connection is optional, if you opt to leave it you can wire it to 5V (bright colors) or GND (normal colors). If you opt to not add I signal you will have only normal colors.75 ohm resistor are inside SCART connectors. For VGA I don't know if they must be added. You can try with resistors added first and remove them if you have colors too dark.
You are welcome.
Regards,Eduardo.PS: Thinking about your laptop, may be you have to set the external monitor with the function keys once windows is running. May be the resolution/refresh rate are outside your TV specs.
De: "Richard Burt [email] [ts2068]" <[email]>
Para: "[email]" <[email]>
Enviado: Martes, 12 de abril, 2016 17:48:31
Asunto: Re: [ts2068] TS2068 RGB
Hi Eduardo.Thank you so much for your assistance, I can build this adapter. The [R]/ 470 OHM/50% with the arrow back to the resistor, is this a Variable resistor set to 50%? Since my RGB interface does not have a Intensity connection, I just have to eliminate all of it? The 75 ohm resistors shown as R in TV scart, are these connected inside the TV? or Do they have to be added inside the TV? Thanks.
Regards.
Richard
On Tuesday, April 12, 2016 10:08 AM, "Eduardo Fuentes [email] [ts2068]" <[email]> wrote:
[Attachment(s) from Eduardo Fuentes included below] Hi Richard,
The first thing you must do is to adapt TTL RGB signal level to analog RGB.TTL RGB is 5V and analog RGB is 0.7Vpp/1Vpp. If your TV don't have explicit support for TTL RGB do not connect your TS-2068 before signal level adaptation.Attached is a signal level converter for RGBI to analog. You can google a little for others.As I know your RGB adapter do not have Intensity (no bright colors) and you can eliminate all components for "I" signal or wire it to 5V or 0V to have all bright or all normal colors.
Composite sync signal TTL levels are OK for VGA.
Respect to pin assignments:
ANALOG R from your interface to VGA pin 1ANALOG G from your interface to VGA pin 2ANALOG B from your interface to VGA pin 3GND of your interface to VGA pins 5,6,7,8,10TTL Composite Sync from your interface to VGA pin 13.
You only will see image if your TV's VGA input supports 15KHz horizontal frequency.
If you don't want to worry to about circuits, signal levels, etc. You can buy a scandoubler, I have a "GBS8220 CGA EGA yPbPr to 2 vga". I buyed it for $55 with shipping to Argentina (Aliexpress) some time ago. I'm pretty sure it will handle positive/negative syncs signals automatically.This adapter is a direct bridge from your RGB interface and any VGA/TV with VGA input
Regards,Eduardo.
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11. Re: [ts2068] TS2068 RGB [2 Attachments]
Eduardo Fuentes · Thu, 14 Apr 2016 14:36
Hi richard,
If both type have continuous adjustment, is up to your taste,I think the square ones only have fixed positions, the picture is not clear enough. See the marks around the white regulator.
regards,Eduardo.
De: "Richard Burt [email] [ts2068]" <[email]>
Para: "[email]" <[email]>
Enviado: Miércoles, 13 de abril, 2016 18:59:21
Asunto: Re: [ts2068] TS2068 RGB [2 Attachments]
[Attachment(s) from Richard Burt included below] Hi Eduardo.My supplier emailed me and now has these [ see picture ] trimpots in stock. I have not ordered the parts yet, which ones would you use? Thanks.Regards.
Richard
On Wednesday, April 13, 2016 5:50 PM, "Richard Burt [email] [ts2068]" <[email]> wrote:
[Attachment(s) from Richard Burt included below] Hi Eduardo.Thank you so much again, I will email you back when I have the circuit completed. I am including a picture of the trimpots that my supplier has in stock. I can test the circuit for proper voltage readings before I attach it to the TV. Take care.Regards.
Richard
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12. Re: [ts2068] TS2068 RGB
Richard Burt · Thu, 14 Apr 2016 22:48
Hi Eduardo.OK I will go with the little round one. I am off on a weeks holiday today, hopefully all the parts will be in when I get back. Thanks.Regards.
Richard
On Thursday, April 14, 2016 10:36 AM, "Eduardo Fuentes [email] [ts2068]" <[email]> wrote:
Hi richard,
If both type have continuous adjustment, is up to your taste,I think the square ones only have fixed positions, the picture is not clear enough. See the marks around the white regulator.
regards,Eduardo.
De: "Richard Burt [email] [ts2068]" <[email]>
Para: "[email]" <[email]>
Enviado: Miércoles, 13 de abril, 2016 18:59:21
Asunto: Re: [ts2068] TS2068 RGB [2 Attachments]
[Attachment(s) from Richard Burt included below] Hi Eduardo.My supplier emailed me and now has these [ see picture ] trimpots in stock. I have not ordered the parts yet, which ones would you use? Thanks.Regards.
Richard
On Wednesday, April 13, 2016 5:50 PM, "Richard Burt [email] [ts2068]" <[email]> wrote:
[Attachment(s) from Richard Burt included below] Hi Eduardo.Thank you so much again, I will email you back when I have the circuit completed. I am including a picture of the trimpots that my supplier has in stock. I can test the circuit for proper voltage readings before I attach it to the TV. Take care.Regards.
Richard
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13. Re: [ts2068] TS2068 RGB [2 Attachments]
rjburt56 · 07 Oct 2016 09:38:52 -
Hello Eduardo.
I can't believe that this much time has gone by since I last talked about my RGB project. I managed to build the circuit that you emailed me about, I tested it and it seems to work, but I could not get a picture on the LCD TV that I have. I took you advice and have since purchased a GBS-8220 video converter, and with my RGB I/F connected to my TS2068, I now have a much improved display on my LCD TV, and a even better display on a VGA monitor.
Is there anyone developing a better system for storage and loading of programs than floppy disks drives, ram disks? I seem to recall someone pro to-typing a flash drive system using USB flash drives? On UTUBE I see being used a twister board and a divMMC, but dose that not make a TS2068 into a ZX Spectrum!! It would be nice to see a dedicated one for the Ts2068.
Thanks again for your help, and advise. Take care.
Regards.
Richard.
14. Re: [ts2068] TS2068 RGB
Eduardo Fuentes · Sat, 8 Oct 2016 05:47:
Hello Richard,I'm glad that you could make it work.Regarding to the DIVMMC storage or something like that. Don Dindang <[email]> have developed a ZX-128 adapter board.It converts a TS-2068 to almost a ZX-128, you can use a +3e ROM to have DIVMMC support. A DIVMMC board can be made to fit in the cartridge bay.
Don is a great guy, ask him if he still has boards to sell.
Regards,Eduardo.
De: "[email] [ts2068]" <[email]>
Para: [email]
Enviado: Viernes, 7 de octubre, 2016 13:38:52
Asunto: Re: [ts2068] TS2068 RGB
Hello Eduardo.
I can't believe that this much time has gone by since I last talked about my RGB project. I managed to build the circuit that you emailed me about, I tested it and it seems to work, but I could not get a picture on the LCD TV that I have. I took you advice and have since purchased a GBS-8220 video converter, and with my RGB I/F connected to my TS2068, I now have a much improved display on my LCD TV, and a even better display on a VGA monitor.
Is there anyone developing a better system for storage and loading of programs than floppy disks drives, ram disks? I seem to recall someone pro to-typing a flash drive system using USB flash drives? On UTUBE I see being used a twister board and a divMMC, but dose that not make a TS2068 into a ZX Spectrum!! It would be nice to see a dedicated one for the Ts2068.
Thanks again for your help, and advise. Take care.
Regards.
Richard.
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