core memory

Arduino core memory shield is ready and for sale

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Hi all,

after three four five hardware iterations my core memory shield is now finished. I am selling it as a kit on Tindie.
I sell on Tindie

coremem-v3

Here is all the material related to the kit:

coremem-shield-app

Thanks to Ben North and Oliver Nash at corememoryshield.com for the inspiration and encouragement!

Building a ferrite core memory, part 2

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My ferrite core memory is progressing nicely. I have received the PCB and assembled it for the most parts.

Core memory shield without sense circuit

This evening I tried out how the H bridges worked – after a few tweaks in the Arduino code I was able to get this sequence out:

ferritecore-2
Bit read values from an array of cores.

The only remaining things are to assemble the sense line circuit and to do the final testing and tweaking, which will most likely take a long time.

Building a ferrite core memory, part 1

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A while ago I ordered some ferrite cores from Bulgaria in order to build a vintage memory out of them. Yesterday I managed to build a one-bit memory by following what Wayne has done.

Newfile2
Writing 1,0,0 to memory which was in state 0. Enable pulses in yellow, sense line in cyan.

DSC_0064

Now that I have an understanding of the technology and the characteristics of the cores I have I will continue to build a 32-bit version in the form factor of an Arduino shield (my own twist of this project).