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Re: [Paparazzi-devel] Re: Futaba T6EXAP 3 Position Switch Hacking

From: Bernard Davison
Subject: Re: [Paparazzi-devel] Re: Futaba T6EXAP 3 Position Switch Hacking
Date: Thu, 7 Aug 2008 11:18:36 +1000

Hi Cory,

Thanks for posting this. :-)
I've been wondering how exactly this radio mod should be done and purchased the T6EXAP radio recently because it is already being used by others.

I'll be making the mod to my radio in the not too distant future and will give you a full review of the instructions at that time. :-)


On 07/08/2008, at 10:23 AM, cory barton wrote:

I added a 3 position switch to my Futaba transmitter. I have added the instructions to the wiki here:

I wanted to add the switch to channel 5, but channel 5 does not appear to have an ADC attached to it. Each channel, and the Dual Rate and Trainer switch is connected to a BU4051BCF IC.

From the datasheet: "The BU4051BC, BU4051BCF and BU4051BCFV are analog multiplexers / demultiplexers which use three-input digi-tal signals for control via an 8-channel analog switch. These products feature high on / off output voltage ratio and low crosstalk between analog switches."

As part of the process of determining if it is possible to connect the 3 position switch to channel 5, I documented the connections to the 4051 IC. I have uploaded that diagram to the wiki in the hope that it may prove useful to someone else.


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