#62

yes, this should work fine; each group of two pins from Teletype carries the exact same signal. The important thing is to match the 3 different signals (SDA, SCL, Ground) on each device.

#63

I ordered a selection of candidates from Sparkfun, most of which are already mentioned above - included here for completeness. (followup to my question at A user's guide to i2c )

  • 2x3 IDC connectors + ribbon cable

    • minimum height required above board: 0.545" (same as a Eurorack power cable)
    • 28AWG wires (0.036" thick with insulation)
    • consistent color code (“red stripe down”)

  • 40-pin jumper wire, split

    • minimum height required above board: housing 0.64", plus about 0.2" for the wire to bend
    • same 28AWG wires as above
    • grab-bag of colors when split

  • single jumper wire, F-F

    • same single-wire housing as the 40-pin
    • available in “regular” 26AWG and “premium” 20AWG (not that that should ever be relevant)

  • 3-pin Dupont connector jumpers (https://www.sparkfun.com/products/10373)

    • three-pin version of the single-wire housing
    • intermediate thickness - 26AWG, 0.05" with insulation
    • consistently color-coded
    • harder to mis-connect

I could see all the variants being useful:

  • the IDC connector approach would be useful in shallower cases since the wires don’t need to make a 90-degree turn after exiting the connector. Also useful if very specific lengths are needed.

  • the single-wire (or split-bundle) jumpers would be useful when interconnecting modules that disagree about what order I2C signals should appear on the header

  • the three-wire jumpers are useful if you don’t need the flexibility of single wires and don’t want to debug that flexibility when connecting things. Sparkfun also has them in 12" lengths.

I also looked at making my own cables with Amphenol Mini-PV connectors (the variety used by both the 1-wire and 3-wire jumpers), but the official crimp tool for installing the pins is $1400+ :scream:

1 Like
A user's guide to i2c
#64

I’m also trying to buy a cable for connecting my Disting ex with a Sweet sixteen, but can’t find it anywhere. Do any of you know a good site where I can purchase a cable?

I2c cable purchase advice
#65

The cables you would need to connect those two devices are extremely generic and have been linked to many places above. Here is one option, with many lengths to choose from: https://www.adafruit.com/category/468

You would simply peel off 3 wires to use to make the connections.

#66

Thanks :wink: So simple wow

#67

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My happiness it’s been so short today,
Amazon sent me a wrong item, I ordered female/female (as the invoice they sent me says
)
So the question is, before returning the item, it’s easy or even possible to mod these cables to female?

#68

Not really, The plastics and inner parts of the crimped wire connectors are all very different on the F/F version.

You’d need replacement housings and these things

1 Like
#69

Thanks, like I thought


After i found this at home, which is the daisy chaining cable for my Hyrlo stereo mixer from Knob Farm, but seems it causes issues (I’ve tried it with Crow&Just Friends with Max for Live ^^ device “JF Synth“) Just Friends freezes very soon after sending it some midi notes from Ableton through Crow

Maybe it’s too long? , it’s 35cm long.

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