NeXT ADB soundboard to NON ADB conversion?

Started by Rob Blessin Black Hole, May 08, 2014, 08:23:08 am

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barcher174

30 Gauge solid core wire is what I'm using with good results. Lead solder is best (easiest). A hot glue gun is useful to anchor wires and to use for insulation. Just use the plain clear glue. I plan on using a drill on the case.

Also let me give this very stern warning:

NEVER PLUG BOTH AN ADB AND NON-ADB IN AT THE SAME TIME.
NEVER.
EVER.


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Brian
Thanks Brian:
You know I have to ask as I'm guessing if both were plugged in fireworks develop I'm guessing chips get smoked may be electric shock . Thank you this is a good point as it would be possible for a Newby to plug in an adb mouse and non adb keyboard into a modified box . I've had them try and plug into the slab serial ports .. So I'll attach warning labels and electrical tape the unused connector.


barcher174

Does anyone know what the connector type is for the blue VGA header?

--
Brian

Rob Blessin Black Hole

Quote from: "barcher174"Does anyone know what the connector type is for the blue VGA header?

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Brian
. Hello Brian:
I just uploaded this today

http://www.nextcomputers.org/NeXTfiles/Docs/Hardware/NeXTServiceManualPages1-160_OCR.pdf
Section 5 covers adjusting the monitor which that sound card would sit in , I think it may be called the yoke connector , if you need me to take photos of what cable connects to the soundcard in a 4000a I can
Rob Blessin President computerpowwow ebay  sales@blackholeinc.com http://www.blackholeinc.com
303-741-9998 Serving the NeXT Community  since 2/9/93

barcher174

The 5V line is not designed to handle much current, so you could very likely fry the board. It is unlikely to cause personal injury except feelings of emotional loss.

--
Brian

barcher174

I tried out one of these speakers today:

http://www.alliedelec.com/search/productdetail.aspx?SKU=70115875

Works perfectly with the soundbox and is also a perfect fit. Sound quality might be a little better than the original, but it's hard to say.

--
Brian

barcher174

More good news today. I have VGA working from the soundbox. We can now scrap the Y-cable and use the original Next cable if it's available.

https://www.dropbox.com/s/2tfeuwgff8p8tif/VGA.jpg

https://www.dropbox.com/s/tchizz8d1kvoxnk/IMG_0588.JPG

--
Brian

Rob Blessin Black Hole

Quote from: "barcher174"More good news today. I have VGA working from the soundbox. We can now scrap the Y-cable and use the original Next cable if it's available.

https://www.dropbox.com/s/2tfeuwgff8p8tif/VGA.jpg

https://www.dropbox.com/s/tchizz8d1kvoxnk/IMG_0588.JPG

--
Brian


Cool that VGA connector look small enough to fit inside the box as well!

Best regards Rob Blessin
Rob Blessin President computerpowwow ebay  sales@blackholeinc.com http://www.blackholeinc.com
303-741-9998 Serving the NeXT Community  since 2/9/93

barcher174

For completeness I tried a cheap mic from amazon today. Works without a problem after cutting off the connector.

http://www.amazon.com/gp/product/B005DJOI8I/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1

Stefano

Awesome work Brian!!!!
You simply made a way to "relive" many NeXT computers!

I've just bought a NeXTstation Turbo (mono) but it's was only the slab.
Now I've bought a non adb keyboard, non adb mouse, an ADB soundbox logic board and a monitor cable from Rob.

As soon as it arrives (I live in Brazil) I'll mod it with your instructions. Will post photos! I plan to fit the soundbox board in a small box with the non adb mini din plug and the vga plug. I'll not use the speaker neither microphone. Maybe I adapt the headphones plug with a modern 3 channel plug for a headset with microphone.

Best regards!

barcher174

Thanks Stefano. I'm glad to help. I had quite a bit of fun with this project. Your turbo can also use ADB peripherals with the correct ROM installed, but I personally prefer the non-adb keyboards.

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Brian

Stefano

Received the NeXTstation Turbo (mono) from the seller and the NeXT non-adb keyboard and mouse, adb soundbox pcb and monitor cable from Rob Blossin !!

Now I need to buy a proper project case, the resistors, some thin wire and begin the modding!

Rob Blessin Black Hole

Hello Brian: I just received my new solder station , it has an adjustable temperature , I'm going to practice on some scrap boards do you have temp recommendation for working on pcb like the soundcard or optical disk boards and does it differ from the NeXT motherboards for capcitors.

I noticed a resistor on the VGA  passthrough connector I overlooked and tried matching it up with a 5 band chart but my eyesight even with a magnifying glass isn't the greatest , do you happen to know what it is so I don't wind up frying something in newby soldering school LOL I want to order the right part !

I bought an www.aoyue.com 866 all in one off ebay for $199 , I'm just setting up an area and it looks very cool and well put together as I peaked inside the box.  

Thanks for your help! Best regards Rob Blessin


Quote from: "barcher174"More good news today. I have VGA working from the soundbox. We can now scrap the Y-cable and use the original Next cable if it's available.

https://www.dropbox.com/s/2tfeuwgff8p8tif/VGA.jpg

https://www.dropbox.com/s/tchizz8d1kvoxnk/IMG_0588.JPG

--
Brian
:)
Rob Blessin President computerpowwow ebay  sales@blackholeinc.com http://www.blackholeinc.com
303-741-9998 Serving the NeXT Community  since 2/9/93

barcher174

Hi Rob,

Temperature wise, you'll have to find the sweet spot for your iron. I also have an aoyue and find that 380 - 400C is a good range. I'm not sure how accurate the temperature gauge is on my iron. I believe I used a 250ohm resistor between the R/G/B VGA signals.  I'll try to double check this weekend. If you don't have the resistor I seem to remember having a washed out image.

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Brian

Stefano

I was thinking in creating a PCB design for the VGA and non adb conector, and the resistors. I've never used the Eagle, but I was good in making my own PCB for my hobby projects.
If I do this, I'll share it in Oshkosh...