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I’m glad you found this inspirational! You can take it to the next level and eliminate the thru-hole, leaving a big pad for the copper sphere to solder onto.

Thank you! If it wasn't for the ADC inputs on the accelerometer, it would have required a lot more hacking to run on the Supercon.8 badge.

Not that I'm aware of. Some possibilities are for magnetic field/flux detection, or as a magnetic communication method (like my the Flux Key demo which detects a specific pattern of magnets held in close proximity to the core board).

Thank you!

Thank you!

Thank you!

Thank you! So many ideas... nice to have deadlines to make some of them happen.

That'd be a double honor for sure!

Thank you !

Thank you very much!

Thanks! The schematic and motor structure were two of the most important aspects of the design - great to know that caught your attention!

Thanks! Making the design more efficient to use a small battery is definitely on my to do list.

Thank you for your compliments. Good work noticing the winder!

Thank you very much!

I appreciate your compliments!

Thank you! It's another unexpected use of core memory that I wouldn't have figured out if I didn't just start experimenting.

@@andygeppert that's right, curiosity is, of all the human traits, the most important trait in my opinion. If it wasn't for the curiosity we would still wonder if it's the earth that orbits the sun or vice versa

Thanks for your compliment. I've paused the weaving fixture by virtue of jamming in other projects... but I intend to get back to this and finish the weaving fixture. Maybe this winter...

Certainly possible, although connecting/disconnecting the wire from the end of the needle needs to be extremely low profile. I understand that when the companies manufacturing core memories became highly automated, they ran a hollow needle through the matrix, and then a wire inside that. Then they secured the exposed end of the wire and retracted the hollow needle.

Interesting idea! I've tried to use magnetic paper to visualize the action in the core, but I think the field is extremely weak, and it's fully captured in the loop of the core, so there is nothing left externally to see. Maybe there are other ways? I like the idea of indicating the pulses either on the LED array (would be more suitable for the Core64) or on an optional OLED SAO screen. It would also be helpful for diagnosing failures in the core matrix. I've added it to the TODO list!

It's a very long lasting, highly resistant, low power form of memory storage

Because he can and is fun? Also this type of RAM may be old design, to big and not able to save much info, but was totally battle tested, literally, was used by the military for ages and was used in space by NASA with high success. Don't take me wrong thou, I'm not saying we should return to it, modern RAM and ROM memory, is way more useful but is good to know other alternatives exist, even if older and their pros and cons.

Thank you!

I have since learned that the magnet isn’t really flipping the core. It’s more accurate to say that it is overpowering the matrix wires ability to write to the core, which prevents a sense pulse from occurring. In drawing mode I use that bug as a feature to determine where the magnet is, and then change the LED state. Either way, the net effect was unexpected for me too and turned out to be a lot of fun!

@@andygeppert ok I see. You wouldn’t be able to write a new state to a care with a strong magnet present.

More of the story from my 2022 Hackaday Supercon overview of the project: th-cam.com/video/r4BBFoSppRw/w-d-xo.html

Great! I'm definitely going to keep offering both the full size and compact version since there is equal demand for both. It will be easier for me to support now that both are using the Pico.

As a pair of 32 bit floats, one geo location!

Thanks for that fun 1K run! Appreciate the feedback on menu. The only mode where state/LED always align is “scrolling text.” I need to revise the drawing mode [firmware] to always reflect it too, as it is constantly scanning the cores looking for a change. The other modes work the same way: write followed by read, expecting to find the opposite state, but if a magnet is present, it blocks the read back as “same state” instead of opposite. It’s subtle, but stems from the fact core reads are destructive. Does that make sense? This is word salad…