kreyren/OSHW-System-On-Module
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Reword the edge connector solution

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Jacob Hrbek 2023-08-04 05:44:55 +02:00 committed by Gitea
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README.md
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@ -50,19 +50,25 @@ The obvious solution would be to use DDR5 SODIMM which has 262pins, but that sti
## Possible solutions
### Use of Edge Connectors on Single Board Computers ("SBCs") boards
### Use of Edge Connectors
Edge connectors are set of contact points on the edge of the PCB designed to slot into a connector, for example it's often used on PCIe x16 graphics cards:
![image](https://git.dotya.ml/attachments/54bd7c9b-b9d6-49ac-9965-5e1fb7d6ee55)
Which has a bevelled edge (minor added cost to fabrication) to fit in the connector
![image](https://git.dotya.ml/attachments/f596d7db-ce35-49f9-8584-ff8e0fcc1ad5)
One solution could be to standardize these connectors and invent a symbol that can be put over them signaling that they follow this standard.
Furthermore in practical example this can be adjusted to making Single Board Computers ("SBCs") more functional:
Lets imagine that we have [OLIMEX OlinuXino-A64](https://www.olimex.com/Products/OLinuXino/A64/A64-OLinuXino/open-source-hardware) board as an example:
![image](https://git.dotya.ml/attachments/15b998d5-eaa8-49bb-8a8b-6bf33adf88e6)
Imagine having an edge connector..
For clarity edge connector are contact points on the edge of PCBs designed to slot into a connector, often used on PCIe x16 graphics cards used for desktop computers:
![image](https://git.dotya.ml/attachments/54bd7c9b-b9d6-49ac-9965-5e1fb7d6ee55)
.. on one side:
which could have an edge connector some-what painlessly added to it
![image](https://git.dotya.ml/attachments/3117b88e-9936-465b-adf7-7b9664da5adb)
@ -70,12 +76,6 @@ For clarity edge connector are contact points on the edge of PCBs designed to sl
This would efectivelly enable OSHW manufacturers to adjust their SBCs so that they can be slotted in this solution.
The issue with this solution is that the edge connectors have to have a bevelled edge to help guide them to the connector:
![image](https://git.dotya.ml/attachments/f596d7db-ce35-49f9-8584-ff8e0fcc1ad5)
which adds extra cost (seems to be a minor added cost for fabrication)
## Projected cost, fabrication, development and usage of OSHW projects utilizing this standard
This standard is a blocker issue for kreyren's (author of this paper) OSHW tablet design for which the abstracted cost and fabrication process is: