CPC2VGA

nikos_a · 16:52, 04 March 24

Quote from: eto on 08:45, 02 March 24
Quote from: dodogildo on 16:54, 01 March 24Wow! Thanks to you I googled and discovered their store. What a great selection of hardware!!
I've been seeking CSync2HVSync – Sync converter for a while, with no luck.
Cheers
The one from Arananet seems to require that the monitor provides the power. If there is no power coming from the monitor (which e.g. the NEC 1970NXp does not do), the adapter will not split the sync signal.

In that case, what will be the output (if any)? I tried a Microvitec CRT and it worked fine. Then I also tried to connect the CPC to a Commodore 1940 and the image was not stable as seen in the video.

eto · 18:47, 04 March 24

Quote from: nikos_a on 16:52, 04 March 24In that case, what will be the output (if any)? I tried a Microvitec CRT and it worked fine. Then I also tried to connect the CPC to a Commodore 1940 and the image was not stable as seen in the video.

The CPCs' sync signal is a composite sync signal and the Arananet adapter circuit is done in a way that it always routes the CPCs sync to H-sync, even if the IC is not powered. If the monitor accepts composite sync on H-Sync (which many VGA monitors do) then the adapter just acts like a simple passive adapter. That's as good as soldering a monitor connector to a VGA cable like this:

I own the Arananet adapter myself and it e.g. doesn't work with the Nec 1970NXp, as it doesn't accept composite sync.

dodogildo · 13:19, 13 March 24

I received my Arananet adapter today and I can now confirm that it works wonderfully.

ford68 · 09:48, 09 May 24

Hi folks

I've got a short question, after I've researched eBay and Co...is there a way, to buy this adapter or PCB anywhere?

Best regards from Germany

ForD68

dodogildo · 10:30, 09 May 24

Quote from: ford68 on 09:48, 09 May 24I've got a short question, after I've researched eBay and Co...is there a way, to buy this adapter or PCB anywhere?

https://www.arananet.net/pedidos/product-category/cpc

ford68 · 14:05, 09 May 24

Many thx for this quick reply...

...I've just placed an order.

Best regards

ForD68

eto · 23:59, 05 September 24

Here's the (hopefully) final version of the Csync-2-HVSync adapter for the CPC.

I probably will make a 3d printable case and will then add it to the Wiki.

nikos_a · 08:57, 23 October 24

Looks nice. And 3D printed case would be lovely. Count me in for getting one of those.

abalore · 11:07, 23 October 24

Nice project, do you have PCBs and components to sell it as a kit (or assembled)? I'd be glad to buy one.

eto · 00:38, 24 October 24

I only ordered 5 PCBs last time and don't have any left at the moment, sorry. But honestly, considering shipping costs, there might not be much difference to ordering the stuff yourself.

The Gerber files are available in the post above or here: https://www.cpcwiki.eu/index.php/Connecting_the_CPC_to_a_VGA_monitor_-_CPC2VGA
( I just recognized I need to add detailed information about the components).

Except for the LM1881 there is nothing you might not already have or can get from a local shop for a few €
The footprint for the connectors allows to use normal connectors usually used for cables (as connectors for PCB are hard/impossible to find and/or expensive)

I have not finished the 3D printable case yet.

zhulien · 00:43, 24 October 24

Quote from: dodogildo on 10:30, 09 May 24
Quote from: ford68 on 09:48, 09 May 24I've got a short question, after I've researched eBay and Co...is there a way, to buy this adapter or PCB anywhere?

https://www.arananet.net/pedidos/product-category/cpc

Any plans for a plus machine version?

eto · 10:15, 24 October 24

Quote from: zhulien on 00:43, 24 October 24Any plans for a plus machine version?

Not on my side. But the schematics are public so anyone who is interested can do a version for the Plus.

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