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Demo boards that display the Tektronix logo and other images on your analog
scopes in XY mode are once again available from the museum!



-Thomas

Just thinking out loud:
Create a SW app that processes a design file (i.e. Autocad, maybe a monochrome BMP ??) into a format that is fed to the ATMega (via a UART port, or USB).
Then anyone could create new displayable images.

Pete

Ooh nice, been waiting a long time.
Too bad ebay are charging 3000yen shipping to Japan for a 5000yen item...

I'll have to keep dreaming...


Jared

25 Sold, now out of stock one day later.

Looks like it has more features than the one I bought some years ago.

Tom

Yup, I wanted to check out my 2465 X-Y mode operation before I bought one, and now it's too late. :( Anyway, I verified that it should work with the 2465 - IF you enable X-Y mode properly. And that required some research here because CH 1 seemed to always move diagonally for me. The solution, as found in another message here, is to select (enable) ONLY CH 2. Then CH 1 will only move horizontally (X direction). Hope they will offer more of those demo boards in the future.

I just went to the ebay link, and it still shows "out of stock" and no way to order it...

I would like to get one of these boards, or at least the programmed Atmel chip or a source code listing for it to duplicate.

Since the last run of 25 sold out, I suspect they will plan to make some more of them. Being an all volunteer organization, it might not happen as quickly as some might like.

I bought mine some years ago at the VintageTEK museum since I live in the area.

Tom

I plan to build 25 more demo boards for the museum in the next couple of weeks, and will post here when they are available again.

-Thomas

We have inventory for another set of 25 and will begin building. Watch the store. We didn't expect this amount of demand and have a lot of shipping to tend to this week.

Please point to where this demo board is described. What does it do? I could not find it on the Tek museum website.When you say? "Watch the store," what store? Do you mean the Tek Museum eBay store? Please add a few details.Larry McDavidSamsung Galaxy S10

?ann sun., 2. mar. 2025 kl. 15:49 skrifa?i Larry McDavid via groups.io
<lmcdavid@...>:

Please point to where this demo board is described. What does it do? I
could not find it on the Tek museum website.When you say "Watch the
store," what store? Do you mean the Tek Museum eBay store? Please add a few
details.Larry McDavidSamsung Galaxy S10

Follow the white rabbit (from the first post):

Given the fact that these 25 boards were sold out rapidly I'd assume there is demand for the next 250 boards rather than the next 25! I hope I will be quick enough next time! Thanks to you volunteers who make the boards!
Joe

Here is the link to the board description. It contains a link to a zip file that has some instructions, a Digikey BOM, schematic, and hex file. I assume the hex file is to load the ATMEGA328P. Unfortunately there is no information on the PCB.

If you go to our website and search for demo board, you find the description. eBay listings disappear when sold out.


Dave

Joe, the board seems very simple to build. If the processor was programmed is there any reason we can't assemble it?
Pretty sure we have the skills and tools to succeed!

And it seems it would take a load off your staff and allow us to have some fun!

Paul
WB6GHK

I was thinking the same thing, make a kit out of it?

Another vote for a kit version.

Open sourcing the design would be awesome. :)

Regards
Jared

FWIW, I'm starting to work on a version that uses an off-the-shelf MCU board, so no assembly is required other than connecting to the vertical and horizontal of a scope, and powering the board (via a USB connector).
And my intent is to make a Windows console app that processes an arbitrary BMP image, and talks to the MCU board via USB to load the 'image' into the board for display. So the image can be changed at any time.

This morning I did a "proof of concept" to verify that I can control multiple analog outputs from the MCU board. The output voltage is 0 to 3.3. The 'bandwidth' of the output has limits - basically a slew rate limit. So small changes in the output are fast, but large step-function changes show some 'rounding'. But it seems to be plenty fast for a CRT display.
The "catch" is (of course) that the rest of the firmware/software still needs to be written... ;-)

The board I'm using is this:

It's only $13 from T.I. I've used this board, and many similar T.I. boards, on various projects (and in my "real job" at HP before I retired). It supports four analog DAC outputs, so I'm thinking that I can support X, Y, and Z axes on a scope.
It implements a USB "console" port, which is easily discovered by Windows as a COM: port. I assume that other OS platforms would do it also. The 5V on the USB port also powers the entire board.

In the SW, my first thought is that a raster display would be easiest (given that a BMP file is the input). And with Z-axis intensity control, it would probably make nice displays of detailed images(?).
But a vector display would also have advantages (more like what the VintageTek board does). Needs more thought...

For a case that does NOT include the Z-axis, I'm thinking that a 'hybrid' of raster and vector would be an easy thing to try: that is, with a monochrome image, the dot moves very quickly over the 'black' parts of a scan line, but 'lingers' on the 'white' parts.

Anyway, if/when I come up with anything that works, I'll be glad to share it.

Pete

Sounds good, Pete!

If you used a raster display, would you have parameters in your code for the number of steps per X and Y lines? It seems like that would be necessary or at least nice, to handle the BW of different 'scopes. I suppose other parameters would be required to enable and setup the Z axis and maybe output voltage ranges on all the axes. Lots to think about here.