Amiga-Digital-Video
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c0pperdragon
A600 Amiga HDMI video design files
Here is my a600 design, tested working fine. It consists of 2 boards and an FFC cable to connect them together.
EDIT: These are the updated gerber files that correct the CDAC signal as noted in post on 8th April 2021. This should fix the unwanted "sparkles" being seen by some people.
You can see the small square board sits around the DAC and you simply solder to the pins. This board is connected to the adapter board by a 20pin 0.5mm FFC cable. (opposite side cable with the actual 20 pin header being bottom contact type.
The cable i am using is a little too long and sometimes i will get a couple of "sparkles". I am pretty sure that a shorter cable should alleviate this issue. Also the VCC and ground use a couple of the pins to increase the connection. You can also add extra ground line if needed.
You will need a bit of soldering skills to solder to the plcc but it isn't all that hard and once it is on it does not need to be removed as it will not interfere with the amiga if the HDMI adapter board is not connected
Wow! This is an ingenious solution for the space problem that a PLCC solution would have.
@c0pperdragon Thanks for the comment, I have just designed an a500/a1k/a2k design also that should fit in all of these mentioned models. Hopefully it is all good and if proven good i will release the gerbers on here. I have a couple of other ideas as well that if they pan out i will share.
This can also be used on the A500 if we make a new adapter for Denise so it only use the ffc cable over to your board klipper2k. This may give more room for other addon boards, I see allot of People strugle with space in the A500.
- I uploaded the Gerber file to PCBWay, and they found an issue. "For the PCB order #W373462ASR4_A600 Denise pushon.zip,here's an issue: here's the rectangle silkscreen in every single layer in the Gerber,here must be something wrong when you export the file? Please revise the file and upload correct one for review."
I might dive into it, but just a note.. This should be the cut out section, but not exactly shure why this is not clearly understood by PCBway...
- Any thoughts on how to put OSD Gotek connected?
i had this done by jlcpcb so not sure what issue is with pcbway. The inner square is identified by dimension layer.
The inner square is 0.800" square and is central to the four holes as a guide to its location
For the OSD, my new RGB2hdmi boards will be here in a few days, they will work/fit in all 16bit amigas (some models will require jumpers for sync/cdac). They have sat in Japan for over a week due to winter storms. Just to clarify, i am referring to the machines with the dip Denise. I have the OSD working for the A600 and will post some info later
here is the order #... Order #: Y212-2279325A
Wow! This is an ingenious solution for the space problem that a PLCC solution would have.
kipper2k is always thinking out-of-the-box to resolve problems with simple solutions... 👍
I did my order with kippers2k gerb files on jlcpcb and had no problems. I was going to order it from pcbway but just never tested jlcpcb before.
it will fit, it sits lower than all of the custom chips all a600 accels will fit
just to prove it, here is one of my a600s...
no issues at all, the FFC cable allows me to place the other portion pretty well where i want. It is best to use shortest FFC cable you can find,, (4 or 6") and it is best to attach the FFC cable to the mobo connector before soldering. It took me a few minutes to do after the fact lol. 1 thing to mention is that the pins on the DAC will be pretty dirty so they need to be cleaned before attempting to solder. I used some fine sandpaper to get rid of the oxides and then make sure you get all bits cleaned off the motherboard
PCBway finally accepted, but:
jlcpcb charges 6 $ for all (5 of each PCB=10), while PCBway charge 56 $ !!!
...Thats a nobraner where my order goes ;-)
yah, pcbway charge more for any design that uses 0.005" traces, if i had used 0.006" then price would be comparable. I prefer to use the smaller traces for boards that need a high density of traces so in this case JLC wins.
I was trying to do something like the QSB here: https://github.com/x-station/xstation-issues#pu-18
struggling with kicad to get the traces and the breakout points right.. but the idea was to mimic the install points against the resistor..
My other plan B was if i just created a board that fitted in the RF slot and mounted to the RF PCB holes I could pull the 5v and GND from the RF pins then just run the short wires from the resistor points to there and then mount the Pi to the PCB that is over the RF area. Further thought was was their a way to break the HDMI port to that board and connect the Pi HDMI to the board instead.. but i think angles and size of solder points might be too difficult.
I will use the same as C4, it is just the 5V power side so if there is any problem you can always add more later.
Did you test any shorter ffc cable to see if you got rid of any artifacts?
I am waiting for the 6cm cables to arrive from ebay. Unfortunately there is no local purchase option
hmmm, having said that...
https://www.digikey.ca/en/products/detail/molex/0151660212/3281093 i just found this on digikey so i will order 1 to try
Aha, I will get some 10cm soon I hope, you know ebay is slow😊 still have some parts to order from mouser, will see if the may have some in stock just to test with.
I have 11cm coming from LCSC. parts are in the country. boards... still in china 😢 Amiga 600.... still in the loft 😭
here is a little video of the hdmi adapter using a shorter cable i got from digikey.
here is link... http://www.kipper2k.com/pics/a600hdmi.mp4
It behaves better than with the larger cable, there is a bit of "shimmer" in places but overall not too bad. I haven't played with options yet
The eagle eyed ones will notice a stray resistor o the motherboard, i did find it lol
Just a reminder, if going to do this mod make sure you clean the pins of the chip to remove oxides (scrape them witj a sharp utility kiffe, make sure you clean up your mess
How long is that @kipper2k ? My 11cm ones arrived today, but boards haven't left china yet... 😭
Bleh... I somehow read your last post as ebay so thought it was different to your digikey link... Well friday evening is already in full swing so i blame the Guiness 🤣 Do you think a bit of foil shielding will alleviate the final bit of shimmer?