Sleeve to convert 2x3 pin header into IDC connector
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Header cover to make your own IDC connectors with positioning tab to fit into a IDC box header
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- Creative Commons — Attribution — Noncommercial
I needed an adapter cable to connect my I2C LED & Key board project at https://github.com/Arnoud-Whizzbizz/TM1638-Led-Key-board-over-I2C
The board is equipped with a 2x3 pin DC3 box header to connecting it to a 5 volt based I2C bus. In my case one of the 5 volt Grove/Seeed connectors of my I2C hub with Grove/Seeed connectors: https://github.com/Arnoud-Whizzbizz/i2c-hub
For more information about all my I2C adapter boards and the hub, see the project page at https://www.whizzbizz.com/nl/i2c-hub
Since I preferred I2C adapters and extension cables with flexible color-coded wires instead of the grey stiff DC3 flat cables with cut and crossed wires on the Grove/Seeed end, I designed a simple 'sleeve' that allows a female 2x3 Dupont header to be easily converted into a six-pin IDC header with a positioning tab. After doing some research, I found that several people had already created STL models for this, so I tried a few of them. But because I wanted a connector that extended slightly higher for better grip, and because I needed a 90-degree right-angle version to connect some fairly specific fischertechnik sensors, I eventually redesigned my own versions, which you can find here. I made two versions of the angled variant to give myself more flexibility. After all, for this type of connector, the box header into which it is inserted dictates which side the tab is on and how the wiring can exit the sensor.
The walls around the 2x3 pin header are quite thin; I achieved the sturdiest result with the orientation shown in the screenshot. It's also a good idea to distribute the print seam randomly to prevent the wall of a single layer from breaking at the seam.
Assembly is fairly simple. I use off-the-shelf Grove-to-Dupont-pin wires, from which I cut off the Dupont pins. Feed these wires through the sleeve, solder them to the correct pins on the DC3 connector, and carefully pull them back into the sleeve. Securing them isn’t really necessary because of the clamping action, but if you want to be extra sure, you can apply a drop of glue inside the sleeve.