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selgus

Atari Portable Project

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I think you've most definitely outdone Ben Heck on this one 👍

 

Looking fantastic :)

 

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6 hours ago, Mr Robot said:

This is really starting to come together. How will you be latching the screen open/closed? 

On the top section, I have two locking clips and on the back of the display, there are two sets of tapered receiving holes that the clips mate with. There are also stops on the lower part of the top section, to let the screen rest in the closed position.

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Very nice! 

 

 I posted about this on facebook, twitter and the abbuc forums, I hope you don't mind. This project really needs to be seen!

 

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2 minutes ago, Mr Robot said:

Very nice! 

 

 I posted about this on facebook, twitter and the abbuc forums, I hope you don't mind. This project really needs to be seen!

 

You're very kind! Thanks for spreading the word. I have been putting a lot of hours into this project, and I do like the current direction. Now, if I only had my own 3D printer and didn't have to wait for my prints to arrive in the mail! :)

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Latest printing, this time in HP Multi Jet Fusion grey nylon 12.. I have been working a bit more on the design, to round off a few areas that had been bothering me.. so one more print to do before I call it official.

 

case-mjf.thumb.jpg.dd92b43e386a86746a779c40082359c8.jpg

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Smallest PCB I've ever designed.. less than 1cm, a flexible cable connector.. with one that is fitted into the motherboard and one that is inside the LCD display enclosure. I am using a 4-connector flex cable to allow the LCD display to slide up and down inside the main body enclosure..

 

flex-connector.thumb.jpg.d7d649d3db5bd655b459b9fbcd1990a5.jpg

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These are the test I did with material jetting colored 3D prints for the keycaps. Reasonable results, but if I was to go in this direction, I would take some liberties with trying to maintain the same scale of the labeling to keycap sizes, and increase the labeling weight. The other limiting factor is these prints are very expensive to produce, so really doesn't make sense..

 

color-keycaps.thumb.jpg.f9f33016c99f43dbd946d679d77ab947.jpg

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It seems the keyboard is the place I am doing the most R&D and iterations.. I wasn't happy with the metal domes, as they were problematic with the 3D printed keycaps, and the whole trying to 3D print in color didn't give me the results I was after. So I've done another method, built up a PCB and modeled the 3D body middle section, along with pad.

 

I'm going with a silicone keypad, with silicone rubber conductive carbon bucks buttons on the newly designed keyboard PCB. I've also re-modeled the body middle section to mate with the silicone keypad, along with modeling a 3D high-definition printed keyboard buck, which I am making a mold around, and then I can pour silicone keypads for the portable..

 

keyboard-carbon.thumb.jpg.ae1eaefd24d1686a91ecd3553a8d1b44.jpg

 

silicone-keypad.thumb.png.89857a27a594032bba223470848f7ff9.png    body-middle-keypad.thumb.png.8a093f70ed942bdda52d484dc4ba9209.png

 

I also had needed to do another revision of the PCB anyways, as I needed to relocate the second connector to the bottom left-side, for clearance reasons.

 

 

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Printed up the buck that I'll make my silicone mold from, and then pour the soft silicone keypads for my keyboards. The buck used Material Jetting VisiJet on a MJP 3D printer and was able to reproduce the engraved labels extremely well. These details will be picked up in the silicone mold, and thereby in the keypads..

 

keyboard-buck.thumb.jpg.5f382fa6cab7f0b910d1a78b7f07c518.jpg

 

Then each key has one of these silicone carbon bucks that makes contact with the keyboard PCB, to signal when a key is pressed..

 

silicone-carbon.thumb.jpg.4511e815ba050bf5eb939f36e5257c26.jpg

 

I'm going to make the mold this week and hopefully pour a few keypads right after.

 

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