The T6EX doesn't have a 3 position switch channel, so I had to combine channel 5 and 6 to get four modes. I made it work with a pot that has double terminals for each knob position, so that way there is always 2 pins to connect cables to for a single position.


Think of this knob as a bridge between same terminals: A to A, B to B, etc, closing the circuit to ground.

Channel 6 is connected to a terminal A and a terminal B from the opposite side.

Channel 5 is connected to a terminal B and C.


This is how the pot look like:


I got this switch at the Home Hardware in College st and and Spadina Av, Toronto, Canada. Sorry I don't have to much information about it. It's just a position knob.

Later, in the radio, I set up 2 PMIX mixes. they appear as PMX 1 and 2. PMX 1 it's at +70%, MAS (for master) is channel 6, SLV is channel 5, SW is channel 5.

PMX 2 is set to -60%, MAS ch6, SLV ch5, SW to ch5.


The final look:


Let me know what is not clear and I will edit this blog!



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3D Robotics
Comment by Chris Anderson on July 2, 2011 at 6:40pm
Excellent! Added to the manual.
Comment by Ritchie on July 4, 2011 at 3:02am

I use ch8 for failsafe and ch7 for mode switching (2 modes + failsafe) but used a pro mini to do this originally actually in the airframe but this is much easier to do and looks good. I have a few switches about so can we get some clarification on the connection between contacts on the switch you have as I have both isolated switch type and common connection types?

Are all grounds connected together?

Are all "A" connected together?

Comment by estebanflyer on July 4, 2011 at 6:54am

yes, sorry i wasn't clear enough, the grounds are both connected, and both A terminals, just like B,C and D are connected together. Think of the position knob as a bar that connects A to A, B to B, etc.


I found this picture of the knob, it's exactly the one I have:


the radio:


Comment by Ritchie on August 12, 2011 at 2:08pm

Just a quickie as I've just done this (ill post pictures in daylight) with the two channels mixed which is the channel the mix comes from?

The mix would dictate that the SWitch is Ch5?

Comment by Olugbenga Ogunbusola on August 14, 2011 at 7:58am

Where can I get to buy the pot or potentiometer used above. I cant find any on ebay and ideas please? Also Cant the mixing be done as it is with Futaba 7C?

Comment by estebanflyer on August 14, 2011 at 10:36pm

Ritchie: yes, the mix 'master' is ch5




Olugbenga: I have no way to know about the 7C, I made it work on mine, but that's all I know.

the pot you can buy it from here:

and i'm sure many other sites. google search alibaba

Comment by Ritchie on August 20, 2011 at 11:30am

I have entered the mixes you stated and have connected both outputs (just to see). While watching the radio readout I see ch5 and ch6 creating pulsewidth and they are both producing (915ms and 2013ms) not a more specific graded pulsewidth from ch5 only. The switch is wired as you have done and the mixes are the same.

Any ideas?

Comment by estebanflyer on August 21, 2011 at 2:46pm

Not really... What you are trying to do is make the pulsewidth gap bigger, right?

Comment by Ritchie on August 22, 2011 at 11:45am

No. I believed this was a way to mix ch5 and ch6 so only one channel would output. The output would be of tangible relation to the pulsewidths needed for mode selection. The setup you have listed when using the radio test outputs both channels as normal but with slightly shift end points.

Did you intend to shift the end points (increasing the pulsewidth gap) or create a single channel that outputs 4 separate pulsewidths?

If you intended the second it hasn't worked for me I get the first and therefore do not get a four mode switch.

Any ideas?

Comment by estebanflyer on August 22, 2011 at 9:57pm


The intention was to have ch5 giving 4 different pulsewidths, but as a result of the connections, you get ch6 also changing pulsewidth. I use ch5 to change modes. If you don't connect ch6, ch5 would only give ON and OFF pulsewidths, like in positions B and C (ON) and D (OFF).

Position A: ch6

Position B: ch6 and 5

Position C: ch5

Position D: none

In conclusion: I guess it's wrong to say that the ch5 is the master of this whole mix, it's shared by both channels.

I hope you can make it work.


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