Hi All you R/C techies -

I have an unusual RC application I need help with! There is actually two parts to this application. What this is all about is separately and independly controlling one of nine totally different items from nine different positions. The servo needs to be 32inoz and there is only one per item. It will be used to turn an arm 90 degrees. So each item needs to have a separate frequency rc reciever and tansmitter. The servo and reciever are mounted independently of any other reciever and servo! The range needs only to be within 300 feet actual 100 feet might do! There can be no interference between any of the nine items. The reciever and servo will be battery powered and the transmitter can be either battery or power supply as they are in a fixed position in nine different locations.

Now the second part of this is to control each transmitter from a central computer so that any one item or selected items or all items of 9 can be activated at once.

Any ideas for a single channel recievers and transmitters with enough bandwidth to have nine operating in a small area without any crosstalk. How about a multiplexer to control nine transmitters.

Told you it was odd application.

Thanks
Mike -

Why does each servo/tx/rx need it's own frequency?

There are many 9 channel transmitters available that will operate on DSM (no interference) and allow you to control each individual servo any way you want.
People use them for crawlers and aircraft constantly.

I have 1 customer who is ordering a 12 channel transmitter/receiver!!!

I know you won't reveal WTF you are trying to do but it would probably help a lot of people understand and solicit more help that way.

You may try ultimaterc.com or RC-monster.com

Good luck!

AS Neu_Racer said you can get a 9, 10, 12 or 14 channel Tx/Rx on 2.4 ghz that will serve you well.

As for controlling them from the computer I am unsure if this is possible. The JR and Spektrum brand radios can have their firmware updated via the factory, so data can be sent to the TX and RX but I dont know if this data can be used to control the TX or RX while operating. I suspect it is possible as these radio can also be used for flight simulators through a data cable connected to the computer.

I would suggest you might be better off pointing your questions towards one of the many robotic forums around the world as this is their field of expertise.

Hi

Well I am only assuming I need 9 single transmitters as the user or operator will be in 9 different positions spread across about 50 feet and each user or operator may or may not want to use the servo. So if I can fine a controller that will allow this type of flexibility for 9 users yea I guess it would work.

Like I said this is not your usually application but if I can find the correct parts it should work fine! Here is the deal I have a shooting range that has 9 retrievals positions that move up to 100 feet on a rail. What the servo will do is turn the target on edge 90 degrees or present the targets face. A PLC (Programmable Logic Array) will control the turning of the target at a specific distance for a specific time and for a interval of time! So why RC servo because the targets move on a cable system and a wired system is not possible over at 100 feet.

The master controller would talk to each of 9 PLC's and instruct them to turn.

I told you it was an unusual application!

Mike -

Wow,
that is definitely an odd application.
I guess I don't understand why one person can't control all 9 targets? If they are all to be turned at the same time, 1 person could easily do it, if they have a 5-10 second gap in between each one turning a single person could still do it.

I spent 7 years in the military and was trained on how to use a computer to control 20+ lanes of 12-15 targets each popping up at preset times. They weren't turning 90 degrees though. I would guess there would be an easier way to go about this then using R/C stuff but maybe not.

Good luck with whatever you do!