Need help to identify parts for building DVI to HDMI converter.  - Page 1
Forum section: electronics / projects

author: cryptlabs
author_rank: Contributor
timestamp: July 26, 2017, 12:38:06 pm
content: Hello,I need to build an adapter for converting the video output connector from DVI to HDMI from an Amiga computer.I cant figure out why the components are used on this adapter.Can someone guide me on building something similar.Its old and I cannot source one.Sent from my MIX using Tapatalk

author: cryptlabs
author_rank: Contributor
timestamp: July 26, 2017, 12:46:40 pm
content: The J2 is for left and right audio the ground is common with the hdmi.Sent from my MIX using Tapatalk

author: cryptlabs
author_rank: Contributor
timestamp: August 04, 2017, 03:25:59 pm
content: Anyone?Sent from my MIX using Tapatalk

author: hermit
author_rank: Frequent Contributor
timestamp: August 04, 2017, 03:31:16 pm
content: I'm confused. You can't just use the correct cable? Am I missing something?https://www.newegg.com/Product/ProductList.aspx?Description=dvi%20to%20hdmi&Submit=ENE

author: suicidaleggroll
author_rank: Super Contributor
timestamp: August 04, 2017, 03:32:00 pm
content: I'm confused as well...HDMI and DVI are compatible, all you need is a connector changer, and they're only a couple of dollars:https://allpinouts.org/pinouts/cables/audio_video/hdmi-to-dvi-cable-scheme/https://www.amazon.com/dp/B01FM52438

author: cryptlabs
author_rank: Contributor
timestamp: August 04, 2017, 03:32:25 pm
content: Thanks for the reply,No, i need to integrate the adapter to the board.Sent from my MIX using Tapatalk

author: cryptlabs
author_rank: Contributor
timestamp: August 04, 2017, 03:33:35 pm
content: I just want to know why the capacitors and diode are there?Sent from my MIX using Tapatalk

author: ebastler
author_rank: Super Contributor
timestamp: August 04, 2017, 03:37:54 pm
content: Hi -- not quite sure what you are after?DVI and HDMI digitalvideosignals are essentially the same. So an adapter from DVI video to HDMI video is just a passive plug adapter. These can be had on ebay for a few $.On the other hand, DVI does not carry anaudiosignal. (At least regular DVI does not; I believe there are some non-standard extensions which "abuse" some pins on the DVI connector to transmit audio.) If you have analog audio outputs only, and want to mix these into the DVI signal stream to obtain a complete HDMI signal including audio, that's definitely not feasible with a passive adapter only. The little PCB you have photographed does not look like it's capable of doing that either. (Although you mention that it receives audio signals on the large connector?!)Could you please explain what output signals you have on your Amiga, and what you need to generate from them?Edit: Typos

author: Polossatik
author_rank: Frequent Contributor
timestamp: August 06, 2017, 05:16:43 pm
content: This seams to be an HDMI adaptor board for the MKII indivision board for an amigahttp://www.bigbookofamigahardware.com/bboah/product.aspx?id=1956created byhttp://www.kipper2k.com/The MKII indivision board seamed to come with an DVI outputhttp://amigakit.leamancomputing.com/catalog/product_info.php?products_id=1085As stated before here in this thread you can get simple DVI to HDMI convertors or cableshttp://amigakit.leamancomputing.com/catalog/product_info.php?products_id=1180, also on ebay, amazon etcNote that DVI to HDMI will carry no sound , so you need a seperated audio cable

author: cryptlabs
author_rank: Contributor
timestamp: January 28, 2019, 07:46:12 pm
content: Do you see the components on that board.http://www.bigbookofamigahardw...com/bboah/product.aspx?id=1956What are they for.Sent from my ONEPLUS A5010 using Tapatalk

author: janoc
author_rank: Super Contributor
timestamp: January 28, 2019, 08:04:03 pm
content: Quote from: cryptlabs on January 28, 2019, 07:46:12 pmWithout schematic and knowing how Amiga talks to this, difficult to say. The three pin thingie on the board is likely a transistor and the rest are just few passives. My guess is that it is used to let the computer know it has been plugged in or to provide power to the HDMI connector.EDIT: the three pin device is a diode (upper right pin is unused) and not a transistor, the two passives are capacitors.

author: cryptlabs
author_rank: Contributor
timestamp: January 28, 2019, 08:08:20 pm
content: Yeah maybe, looks like a diode.Thanks anyway.Sent from my ONEPLUS A5010 using Tapatalk

author: Dundarave
author_rank: Regular Contributor
timestamp: January 29, 2019, 04:31:14 am
content: You might want to try to contact the person runninghttp://www.kipper2k.com, as they look like the people who designed it. kipper2k@shaw.ca is the "Contact" email.

author: cryptlabs
author_rank: Contributor
timestamp: February 22, 2019, 12:17:53 pm
content: Quote from: Dundarave on January 29, 2019, 04:31:14 amI did, many times actually. Never got a reply.Sent from my ONEPLUS A5010 using Tapatalk