Mixing servo signals?

[Roj]

Hi- i'm after some advice for what i assume is a basic question on this forum.

I'm after a mixer that will combine 3 servo signals into one.
The proportion of control for each input would need to be adjustable - either by a trimpot or otherwise programmable by software.

While i'm handy with soldering iron; if such devices are readily commercially available I'd be inclined to buy one rather than make it!

Alternatively, do programmable RC receivers exist that allow the same thing?

Cheers.

[Roj]

Oh -in case anyone is wondering, I do have a programmable transmitter (Profi 4000): the reason i want to mix servo signals after the receiver stage is because i need to mix gyro signals, sort of a draganflyer like craft i want to build.

[vintage1]

Ah. This sounds like a custom board with trimpots and a PIC.

Its not too hard to do the hardware, but your algorithms and software will need some seeing to...

[Roj]

Thanks.
I've just spent the last few hours reading some of the links from this forum: I guess custom board and P.I.C. seems inevitable.

I remember seeing a "v-tail mixer" for combining 2 servo signals and was wondering whether a simple commercially available solution like that existed for more complex applications but it seems not.