For sale: RGBtoHDMI boards

[IanB]

I have a number of 12 bit RGB to HD 'hats' and add-on analog boards for sale both as partially built kits and fully assembled:

RGBtoHD
Kit: £25 (Only 1 or 2 through hole connectors left to fit and a cable to be made up)
Built: £30 (Including cable)

Add-on Analog board:
Kit: £22 (All surface mount components are already fitted, only through hole parts have to be soldered)
Built: £25

Assembly notes here:
https://github.com/hoglet67/RGBtoHDMI/w ... mbly-Notes

Here is a photo of the original kit and a built up board :
(The latest 12 bit kits have all components fitted except 2 connectors)

Here's a photo of the analog board:

Computers supported by the main TTL board:
BBC Micro / Master 128 / Electron
Oric / Atmos
IBM PC MDA / CGA / EGA
Spectrum 128 / +2
Sinclair QL
Camputers Lynx

Computers supported by the analog board:
Amstrad CPC
48K Spectrum (no bright colours)
Spectrum +2A
Spectrum +3
ZX80/81 (requires composite mod)
Dragon (requires signals picked up internally)
Tandy Color computer (requires signals picked up internally)
Tandy TRS80
Apple II or IIc or IIe
Atom
UK101
Ohio Superboard
Nascom II

The analog board also works with Commodore 64 and Atari 800XL but both of those machines require c0pperdragon's YUV interface fitted internally.

Finally it will work with the TI99/4a (PAL YUV only) and other computers that use the same video chip but that requires an extra chip fitted on the analog board which is not included as standard.

Most of the 3 bit TTL computers like the beeb will still work via the analog board although if your beeb has a very asymmetric 12Mhz mode7 pixel clock you might get a slightly better result bypassing the analog board and connecting directly to the TTL inputs.

In addition you will need a Raspberry Pi zero with 40 way header and a micro SD card (any size so get the cheapest but probably not >32GB)
You will also optionally need a case and the recommended model is linked in the wiki
https://github.com/hoglet67/RGBtoHDMI/w ... t-Board%29

I will include the two spacers required for the above case with each board.

[1024MAK]

I have a number of 8 bit RGB to HDMI 'hats' and add-on analog boards for sale both as partially built kits and fully assembled:

RGBtoHDMI
Kit: £20 (All surface mount components are already fitted, only through hole parts have to be soldered)
Built: £30 (Including cable)

Add-on Analog board:
Built: £25

Hello Ian

Can you please put me down for:
2 x RGBtoHDMI kits
1 x Add-on Analog board (are these available as kits as well with just the SMD parts already fitted?)

Thanks

Mark

[markdryan]

Hi Ian,

Could you put me down for 2xRGBtoHDMI kits please?

[IanB]

1 x Add-on Analog board (are these available as kits as well with just the SMD parts already fitted?)

I wasn't going to bother with a kit for that as there isn't much soldering to do but as you've asked I've added a kit price as well.

[KenLowe]

Hi Ian

Can you please also put me down for

2 x RGBtoHDMI kits
1 x Add-on Analog board kit

Thanks

[patb1au]

Hi Ian -

Please put me down for:

1 x RGBtoHDMI built
1 x Analog board built

Thanks

Pat

[Boydie]

Please could you put me down for:

1 x RGBtoHDMI kit
1 x Analog board kit

[sfalvey]

Please can you put me down for one rgbtohdmi kit and one analogue kit?

[Mince]

Great news! Please could you put me down for:

1x RGBtoHDMI built
1x Add-on Analog board built

... thanks!

[VectorEyes]

Could you put me down for one RGBtoHDMI built and one analogue board built please?

Thanks!

[mark71]

Hi Ian

Can you put me down for:-

2 x RGBtoHDMI kit
1 x Analog board kit

Thanks

Mark

[JohnJones]

Hello Ian

I'd like to confirm my previously expressed interest in the following:

1 x RGBtoHDMI: Built £30
1 x Analogue board: Built £25

Many thanks.

John

[trixster]

Hi Ian,

Could I buy the following, if possible?

1 x RGBtoHDMI: Built £30
1 x Analogue board: Built £25

Thanks!
Andy

[nickm]

Hi Ian

Could I buy 1 x RGBtoHDMI kit if possible please?

Thanks

Nick

[markrwj]

Could I have 2 x RGBtoHDMI kits and one analog board.

Thanks

Mark

[PhilYoung]

Hi,

Could I have one of each kit please ?

Cheers,

Phil Young

[lcww1]

Hello,
Thanks for making these available.
Could I have 1 built RGBtoHDMI board, and 1 built analog board, please?
Thanks,
lcww1

[walkerworks]

Hi,

Could I buy 1 x RGBtoHDMI kit please.

Derek

[sfalvey]

Hi Ianb,

Can you pm me your email address pls? I dont have PM privileges yet.

thx

[1024MAK]

Hi Ian

In the other thread (link) you show that you have now managed to get a version working with an Atari ST.

Are the boards you are selling in this topic suitable? If yes, I’ll have another. Heck, these are darned useful anyway, so please add another GRBtoHDMI kit to my order anyway. And if different boards are needed, please put me down for at least two of the new ones.

Also which of the Atari ST range will it work with, I have the following:

• Atari ST (original range with external PSU and no internal disk drive),
• Atari STFM - built in PSU and built in disk drive, the U.K. models have a built in RF modulator,
• Atari STe (as the STFM, but has different video circuitry)
• Atari Mega (two box professional computer based on the STFM)
• Atari TT (two box professional computer, faster more capable version over all the above)

Cheers

Mark

[IanB]

Are the boards you are selling in this topic suitable?

Not really, you can make it work with track cuts and links but there will have to be a new 12 bit board to do it properly.

Heck, these are darned useful anyway, so please add another GRBtoHDMI kit to my order anyway. And if different boards are needed, please put me down for at least two of the new ones.

OK

Also which of the Atari ST range will it work with, I have the following:

I only have a 520STFM and I'm not familiar with the other models. It picks up the RGB signals internally from the shifter chip (R1,R2,R0,G2,G1,G0,B2,B1,B0) plus the mono signal and H & V sync so if those signals are available on other variants it should work for at least the same resolutions as the 520STFM at any bit depth up to 9bits per pixel. What other resolutions (if any) do the later ST versions output?

Mono only 640x400 should work as an external solution because the mono output and sync signals are already available on the ST's video connector at TTL levels but I haven't tried that. It might also be possible to make a fully external solution for both Atari and Amiga with a different analog board design but I haven't looked at that yet.

[grannyg]

I'd like 1x RGB + 1x Analog. Both built if there are any still available. Thanks.

[1024MAK]

Hi Ian

On that basis, it should work with the following models, as they all have the same shifter chip:

• Atari ST (original range with external PSU and no internal disk drive),
• Atari STF - built in PSU and built in disk drive,
• Atari STFM - built in PSU and built in disk drive, the U.K. models have a built in RF modulator,
• Atari Mega (two box professional computer based on the STFM)

I’ll have to check on the STe, as it has different video circuitry (more colours, a palette of 4096) and I forget what signals are available. It’s been a while since I poked around the video circuitry of these. See here for more details.
The same will apply to the Mega STe models.

The TT (more info) is much less common and I’ve never poked around inside mine. So I’ll have to check.

Due to the 4096 colour palette and the different video circuitry for the STe, Mega STe and TT, I suspect that RGBtoHDMI may not be suitable for use with these.

Mark

[1024MAK]

So the shifter in the STe and Mega STe has four output lines/bits per RGB colour (12 bits total) and therefore if RGBtoHDMI can cope with 12 bits of data it should be possible. Although it looks like picking up the internal signals will be easier on the resistors used as a DAC ladder rather than in the IC pins.

Mark

[IanB]

So the shifter in the STe and Mega STe has four output lines/bits per RGB colour (12 bits total) and therefore if RGBtoHDMI can cope with 12 bits of data it should be possible.

I've continued this technical discussion in the main thread viewtopic.php?f=3&t=14430&p=287417#p287417

[IanB]

All boards are sold out now but please post if you want to reserve boards from the next batch

[sdhip]

Second batch. Yes please -- just one RGBtoHDMI board please.

[SpaceFlightOrange]

Hi Ian,

Could I reserve one RGB-HDMI and one analogue board please? Kits please, or built if that's what you go with.

Thanks

[mlouka]

I would like to reserve a built RGBtoHDMI from the second batch, please.
I can provide my parents' UK address for delivery (I live in Norway).
Thanks!

[1987akaTheMoneyPit]

Hello Ian,
Can you put me down for:-

2 x RGBtoHDMI kit,
1 x Analog board kit.

Many thanks and regards
David