Qx7 unused connectors

Hardware help and support for the FrSky Taranis
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maxfpv
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Qx7 unused connectors

Post by maxfpv » Fri Oct 06, 2017 10:57 am

Inside the taranis qx7 there are two connections labelled p400 and P401 that are unused, does anybody know why they are there or if they could be used for something like extra switches. I have attached a picture.
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FrSky-Taranis-Q-X7-main-board.jpg

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Kilrah
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Re: Qx7 unused connectors

Post by Kilrah » Fri Oct 06, 2017 12:11 pm

They are 2 extra switch inputs but which do not currently have software support in OpenTX.

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MikeB
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Re: Qx7 unused connectors

Post by MikeB » Fri Oct 06, 2017 1:06 pm

I have added support for these in recent test versions of ersky9x.

Mike.
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ShowMaster
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Re: Qx7 unused connectors

Post by ShowMaster » Fri Oct 06, 2017 2:09 pm

MikeB wrote:I have added support for these in recent test versions of ersky9x.

Mike.
That’s good to know Mike.
Do you possibly have a pinout or them?
How would one use them, as a 2 pos sw closure, or 3 pos? Maybe with a pot?
Thanks


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MikeB
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Re: Qx7 unused connectors

Post by MikeB » Fri Oct 06, 2017 2:30 pm

One pin is ground and the other connects to the processor that has an internal pull up resistor. Use them for additional, 2-pos switches, where the switch simply either leaves the two pins unconnected, or shorts them together. They are digital inputs, so no pot possible.
Configuration is done in the Hardware menu where you have two possible extra switches, PB1 and PB2. Set these to use either EXT1 or EXT2 depending on which connector they use.

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maxfpv
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Re: Qx7 unused connectors

Post by maxfpv » Tue Oct 10, 2017 8:12 am

Thanks for the info guys!

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Re: Qx7 unused connectors

Post by ninjazx11 » Tue May 08, 2018 9:46 pm

maxfpv wrote:
Fri Oct 06, 2017 10:57 am
Inside the taranis qx7 there are two connections labelled p400 and P401 that are unused, does anybody know why they are there or if they could be used for something like extra switches. I have attached a picture.
Hi folks, Does anyone know the type of connectors used on these 2 plugs?

I am thinking to put 2 extra switches on my qx7 and i need to order matching plug that i can just plug it in.Thanks

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MikeB
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Re: Qx7 unused connectors

Post by MikeB » Wed May 09, 2018 9:23 am

I'm fairly certain they are JST PH and are on a 2mm pitch.

Mike
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ninjazx11
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Re: Qx7 unused connectors

Post by ninjazx11 » Wed May 09, 2018 2:07 pm

MikeB wrote:
Wed May 09, 2018 9:23 am
I'm fairly certain they are JST PH and are on a 2mm pitch.

Mike
Thanks a lot Mike.

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MikeB
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Re: Qx7 unused connectors

Post by MikeB » Wed May 09, 2018 10:04 pm

I now seem to have 2 extra pots fully working on my QX7 with ersky9x. I've wired them up with connectors in line as I haven't decided yet where I'm going to mechanically mount them or whether I want pots or sliders, so I've just got them on flying leads.
I've still to post the firmware, and would advise not actually connecting new pots until you have the firmware installed.
The two signals that were driving the red and blue LEDs in the power switch are on a 15-way connector labelled 'Y'. They are pins 8 and 9 counting from the left. You may simply cut the black wires to access these signals. I happened to have some wires from a similar connector, so I extracted the black wires, with their crimps and plugged in my replacements (the blue and yellow wires near the middle of the connector, not the existing yellow one at the left end), see the picture Analog.jpg.
The new pots also need analog power and analog ground. I obtained these in two ways. First I picked these from the main board, see Power1.jpg. The analog ground from one side of a capacitor (orange wire, looks a bit yellow in the picture), the analog power (3.0V) from a pad labelled "VREF3.0" (brown wire). I used these for one of the pots.
For the second pot, I broke into the power and ground wires going to an existing pot, see Power2.jpg. I cut the existing red and black wires, put a piece of heatshrink over one wire, then soldered them back together, along with a new wire that goes to the new pot. I then slid the heatshrink back over join.

All that then remained to do was go into the hardware menu of the updated firmware, and set POT3 and POT4 to the appropriate sources. Currently, for reasons of how the firmware is structured, these new pots appear as SR and P3, although I will have a change done so they appear as SL and SR.

I now have a slider on the left of my QX7.
A bit of a tight fit, the slider is fixed using hot glue inside, and I also have a HC-05 bluetooth module just beside it and they only just fit.
Mike

Before anyone asks, the wires on the right of Power1.jpg are my connections to the HC-05 bluetooth module.
Analog.jpg:
Analog.JPG
Power1.jpg:
Power1.JPG
Power2.jpg
Power2.JPG
X7Slider1.JPG
X7Slider2.JPG
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jhsa
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Re: Qx7 unused connectors

Post by jhsa » Thu May 10, 2018 12:46 am

Looking good Mike.. It starts looking like my own radios Ha Ha :mrgreen:

You just need a micro DIY Frsky compatible D8 receiver outputting SBUS for a very nice wireless trainer setup. Bluetooth akso works very well, but I was having the odd connection drop when my son moved a little further away from me.
It also transmitts, so there is more chance of interfering with the main module. The DIY receiver only receivers (obviously :) ) and it has better reception. Never tried but I bet it does 100 metres without a problem.. Never had a connection loss.. :)

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