We are re-engineering the old PCB board into a modern PCB for a simple swap. The goal is to get an up to date RPI computer
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After a pause, I'm back on the project. I was waiting for a good color display. WaveShare has released a cool 800x480 IPS color touch display (4 inch). This one seems to fit well into the re-visited pc board.
Tonight we are going to test the freshly received display with our selected Raspberry PI ZERO 2W . If ok, we will adapt the board and send to production
Hackster.io has published a detailed article about this mod.
Preparing to add a very low power switch...
I had to revert KICAD back from nightly build to stable and lost a pqart of the work because of file down compatibility issues. I had to redo the routing.
Here is the first experimental schematic diagram (still some work to do). Until I get a Compute module 3, I will use the RPI PI ZERO W computer.
Next step tomorow
I also got the Voyage 200 model which replaced the TI92. All the work made with TI92 will speed up the conversion process for the new model
Now trying to connect the 4 inch to the RPI PI ZERO . Looks like this tutorial will ease the process . Shows how to install ST7796s on raspbian. The website also offers pre-compiled images.
I tried to route a bit... everything seems ok. There is much room to work with security and comfort.
Before I finish the routing I have to finish the schematic with the RPI stuff.
Time to read on how to drive the display with the RPI ZERO and RPI CM4 .
oups, thanks to you for the comment
There was a mistake in the buttons footprints
I corrected the button mistake ... and updated the files
I've just updated the GITHUB directory with the latest kicad dev (please is the last nighly built of kicad to open the files)
I added the buttons on the board.
It is not time to work on the raspberry pi zero and RPI Compute module 4 add.
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Hey everyone, I would like to contribute to this project. My application status is 'pending' for the past few days. Any suggestions?
Just for fun, check out this page with a beautiful mockup image of the TI92, which might even serve as an inspiration: http://androidarts.com/palette/Misc.htm
Love it. Wish the TI-92 had the d-pad on the other side.
Is the screen on the Voyage 200 identical to the screen on the TI92? I have a TI92 on the way but it does look like the voyage 200 is a slightly larger screen, or is that just an artifact of the photo angle?
I've not yet opened the voyage 200 to keep all my energy on the TI92 dev/ But at first glance, it is the same display.
Thanks, I have a ti92 on the way but haven't bought anything else until it gets here. But if it would require opening to know that suggests the Voyage isn't significantly larger if it is larger at all, so that pretty much answer my questions right there.
Very good idea !, I buy TI92 and the LCD this morning.
Am very interested in this project. I was playing around with the thought of shoving a pi4 into a nspire, a little more incognito, but this also looks very interesting.
<strike>Is the plan to find a touchscreen for mouse input, or maybe use the upper right hand pads to create mouse input?</strike>
Ahh, nevermind, touchscreen.
Please check your 6mm pad footprint - there is short circuit between P1 and P2 (second vertical trace from right on lower half)..
Thanks for the remark. ahhhhhh correcting
The donor calculator seems to offer a lot of space to work within. Looking forward to seeing what you come up with.
Awesome! And these calculators are indeed very cheap on ebay, so I definitely consider making one as well.
yes. They were also widely distributed ... :)
Well, I never saw one before, but I suppose that's an age thing. Every generation has it's own calculator :-)
yes. They are rather old. I remember using it with RAMSES II in class :)
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I have a circuit board designed and fabricated for the TI-92. It fits beautifully, and I'm bogged down doing board bring-up and could use some help. I'd love to share the board design here. Can anyone accept my application?