Comment by OlivierD. on February 23, 2011 at 5:46am

This is very interesting. How many channels do you figure we can obtain with this module? Great find!

Comment by Roman on February 23, 2011 at 5:50am

I think you can add 2-4 channel more to the original 6ch transmitter, but you have to have the good receiver.

I believe the maximum that Spektrum have is 9ch receiver...

the channel expander has not been tested yet, because I only have 6ch receiver... ;)

Comment by OlivierD. on February 23, 2011 at 6:23am

NIce, so we could go up to 10 maybe. That would be great. Spektrum is releasing a 10 channel DX system in June

See here:

http://www.spektrumrc.com/Products/Default.aspx?ProdId=SPM2800US#st...

So a 10 channel receiver will be available, maybe we can make it work with this! For cheaper

 

Comment by Marco Glattfelder on February 23, 2011 at 6:30am

I'm working on somthing similar. An dedicated FPV video rx and camera movement (HEAD TRACKING) tramsmitter.Actually I grab the PPM signal from a head-tracker gyro (the one from HK) with an Arduino. I process that signal to a 2nd Arduino (the first one operates with an interrupt an cannot do much more than decode ppm) that re-encodes ti to a 8ch corona DIY tx. So I expand from 2 to 8 channels

Thath 2nd board has some control sticks for the manual movement of the cameras and some switches to trigger the video switch on board and operate the zoom of the 2nd camera (I will use a fpy camera in the front and a 30x optical zoom camera in a dome on the plane belly). The idea is to completely indipendent system leaving the "normal" rc tx/rx free from any fpv operation.   

I can say that synchronize all that ppm signals was not easy. But i'm at a good point. Maybe i'll post that project later.

Comment by Roman on February 23, 2011 at 6:50am

if cheaper is not buying a 10ch Spektrum radio, Yes it is cheaper ;)

but you still need something to inject your channel, for me it is my smartphone who's doing the job over bluetooth, and I plan on using the inside Accelerometer/Magnetometer as channels for FPV flying ;)

 

Comment by Nick on May 3, 2011 at 11:56am

Can you explain a little deeper on what you were able to do with the Bluetooth because I'm very interested in controlling things from my phone.

Thanks,
Nick

Comment by Roman on May 3, 2011 at 12:20pm

hello,

In one way (Radio->phone) I send the servo positions given from the radio and the telemetry data that cames from the 433Mhz transmiter, and on the other way, I can send new data instead of the original ones and eventually add channels.

 

Comment by Nick on May 3, 2011 at 2:31pm

I'm sorry i'm having a hard time understanding, so there is a possibility for sending data from the phone to the transmitter (phone->transmitter) or is it data telemetry?

Comment by Roman on May 3, 2011 at 10:40pm

hello,

yes it is possible to send data to the transmitter (rc channels).

No I'm a little stuck, I can't get a transceiver (the small module that is in the transmitter) replacement, so I had to use a trick to make it work...

Comment by Nick on May 4, 2011 at 7:33am

Ok, well good luck with your project and keep us updated.

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