Pinout of the rpi pins used in v4 for smaller ribbon cable

Except soldering directly thin wires on the pins, I can’t see any solution for wiring everything together.

I think that everyone here will be happy to discover such a “perle rare” :wink:

I’ve found you can be much more creative if you tear out the individual cores from a ribbon connector and cut the ones you don’t use. I tend to use the webconf to shunt pins into specific bunches. I find it much simpler to buy pre made 40 pin leads and cutthem down than try to make the 40 pin idc connectors in such setups as the inevitable movement can work pins into the dreaded intermittent state which are a real pain to locate especially in these situations.

Sadly the number of cores and size of the conductors in modern ribbins is considerably less than it used to be which means it all gets rather fiddly. But I’ve squeezed 40 pin connectors with ribbons and encoders into Hifiberry plastic boxes and it all seems to hang together. They’ve been on stage without mishap :smiley:

It’s pin 40 (DOUT), not 49 :wink:
If you want audio input (ADC), also pin 38 (DIN), that is wrongly labeled as 37 in the image.

Hi @Pastitas, have you tried to flip and rotate 90º the soundcard? Perhaps you could align the row-pin connectors so you don’t need to fold the ribbon …


Flipping it is the real problem, maybe i can fit it, it’s definitely an option but the ribbon needs twisting anyway since the screen’s pin 1 is on the opposite side
one approach that has worked before is “de-ribboning” the cable after the connector is made, wich helps with the problem of twisting

As stated above, splitting the ribbon cable then removing unrequired wires gives far more flexibility. Individual cores are pretty lightweight and flexible. It is the binding into a ribbon that gives it the stiffness. Using multicoloured ribbon cable helps identify conductors when splitting out like this.

OK! I see … and rotating the display 180ª is not an option because the push buttons would lay on the upper side… or would you accept this?

Anyway, if possible, i think you would get an easier path for the ribbon by flipping & rotating the soundcard. Flipping the ribbon is not so difficult. You can do it with 3 folds like that:

Yeah, this would be the objective, that’s why i was asking for a pinout of required pins per part

Yeah, that’s what i was thinking of doing, but how do you exactly go about this? dupont connectors and that’s it? maybe some pictures could clarify as i don’t think i’m understanding you

A Build with Variations variation: HiFiBerry Amp+ did something along these lines…

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okay, i got an idea from what you said, i rotated the soundcard but not flipped it, like this

, in this way by just doing what you said before the screen and soundcard i would get it going, the only thing left would be the all in one

If you don’t intend to use the zynaptik extensions and only need the MIDI circuitry, then you could consider connecting only the needed pins with dupont wires:

  • VDC 5V
  • VDC 3V
  • GND
  • UART pins (pins 8 & 10)


BTW, why not to plug the soundcard on top of the RBPi? The heatsink? You could conduct the heat using a L- plate and place vertically the heatsink+fan, flowing fresh air from the outer space …

You could use an IDC air-male for plugging the duponts from the ribbon, like the zynthian v1:

I would be concerned about Dupont cables becoming dislodged. The IDC connector has been good physical integrity.

i’ve been looking for those but really couldn’t find that connector for sale anywhere

This is the sink that i’m using, cannot really hear it when running, but i cannot cover the pi
I know this might be overkill but i would like my pi to be actively cooled because spain, summer and tiny practice rooms without AC

I think if you made a multiple pin header from dupont it might be good enough

There is a link above