Independent wireless servo controller setup...easiest way to do it?

[MKMaverick]

I've got multiple UAV's and payloads that I would like to easily interchange, and sometimes have the need to operate a payload OFF of a UAV.
So I've been trying to come up with a totally separate transmitter/receiver system for servo control ONLY.
Ideally it would be able to control 3-4 channels, and be small....I don't want to have to carry and use another full-size transmitter.
What's the easiest way to do this? would it be to tear out the guts from a tx and mount it in a smaller form factor somehow? I don't need the sticks, just a couple switches and poti's would be ideal. But would running say two 2.4ghz systems side by side terribly affect my control performance of the bird itself?
Could it be as simple as something like this, with servos connected to one and a servo tester connected to the other? Or does it need something else to help it work, like an arduino?
https://www.aliexpress.com/item/2-p...a50737e-e24f-46ec-84ae-b271d3663a41&tpp=1
https://www.aliexpress.com/item/New...7.html?spm=a2g0s.13010208.99999999.262.UrznnT

 

[DroneTalk]

Yes using a operate TX/RX would work the only issues is distance some of those rx/tx only work a few hundred feet.

 

[MKMaverick]

Really? haha, sorry...I always get these simplistic ideas and they turn out to never be that simple.
So if I connect a servo tester directly to the Tx, and the servos directly to the Rx, they will all understand the signal and the servos will actually operate? I don't need some additional controller board or such in the middle?

 

[DroneTalk]

It's allot more complicated than that- https://www.pololu.com/blog/238/wireless-servo-widget . Servos need a PWM signal than you need to convert that to digital so you can transmit and receive. You would be better off with using a separate r/c transmitter or a simple garage door opener and a relay on the other end to activate a servo for on-on command.