FrSky 2.4Ghz conversions - a how to

[Dyna]

Just doing the Gemini 2 conversion now, and i have to say atm its easy. Bit of dremmeling required, but nothing too major - the hardest bit is not breaking through plastic on the ariel section. If it all goes well it will look factory - theres even a nice empty space for the button & LED above the throttle stick

Even the PCB picture JCJC put up on page two of this thread looks correct - although ill test it before i solder.

If it works well this could be the bargain of the 2.4 sets - a 2nd hand Gemini 2 for 20 quid, 2.4 module and reciever for another 30 quid

[danmurphy]

Originally Posted by sheddy

I have one fitted in my KO esprit 3, used at two meetings now and works perfectly.

Where did you locate the module? Looking at the dimensions of the FrSky module it looks too big to locate it in the existing module casing on the back.
Also wondering which of the 5 pins from the module connector to solder the 3 wires to?

[Moose]

the module fits very good in the module case but you should cut the blue heat shrink on both sides down an bit and you have to cut the crystal channel .
Pins are:

PPM
-
+
-
aerial

[danmurphy]

Originally Posted by Moose

the module fits very good in the module case but you should cut the blue heat shrink on both sides down an bit and you have to cut the crystal channel .
Pins are:

PPM
-
+
-
aerial

Thanks! I presume they are labelled on the board when you take the back casing off?

[Moose]

only did a EX 10 helios jet but nothing was labled

@danmurphy: Frsky is only compatible with frsky. (There is a frsky receiver for futaba though)

[danmurphy]

Originally Posted by Moose

only did a EX 10 helios jet but nothing was labled

@danmurphy: Frsky is only compatible with frsky. (There is a frsky receiver for futaba though)

Thanks Moose.

[sheddy]

Originally Posted by danmurphy

Where did you locate the module? Looking at the dimensions of the FrSky module it looks too big to locate it in the existing module casing on the back.
Also wondering which of the 5 pins from the module connector to solder the 3 wires to?

Without looking I cant remember the wire sequence but I will have a look at mine over the weekend and post some pictures, I didnt put the Frsky module in the ko module case, actually got it to fit inside the handset then sold the KO module on ebay. Have just covered the module slot with some thin carbon fibre to tidy it up.

[migsy]

if anyone has done a sanwa gemini 2 40mhz to a 2.4ghz, please show some pics of the out lay so i get an idea of how to go about it.

cheers..Alan

[ianholt]

I have the Etronix Pulse (Core-RC CR151 CODE 2.4Ghz) system and am having trouble with loosing the signal. I think it is the Rx but for the £25 to replace it and then discover it is not that! I could get the FrSky conversion with an extra Rx.
Does any body know if it can be used with the Pulse (Code) radio as it is already 2.4Ghz!
I posted a question on the Hobby King website and got this reply.....
I would recommend you check on your radio first, the main thing it needs is a PPM and power signal heading to a transmitting module. This is within the radio as three wires, but check your radio has ppm first. However this module hasn't given me any interference troubles and so far, plenty of range. All it needs is to be mounted and connected. Works great.
How would I know which is the PPM wire?
Thanks
Ian

[john333]

That I'm afraid is the million dollar question, without an occiloscope I don't know how you would find it if it's not marked. I relied on asking the question on the giant cod forum, maybe do the same?

[danmurphy]

I've just finished converting my KO Esprit 3 Universe. Fitted the module inside the main casing behind the old module housing. Easily located the 3 wires off the old interface board (they are labelled) and soldered them to the hack module

Conversion looks good, much neater without an aerial sticking out of the back
I'll post some pics later when I get chance.

[danmurphy]

Original Interface board identifies PPM, + and - wires


3 wires removed from the board and soldered to the new hack module wiring loom


Shows module connector back in the main board with hack module attached


Bind button and LED board held in place with servo tape and wiring loom secured with makeshift lexan bracket. Aerial plate dremelled out to fit new aerial with push fit.


All Done and successfully binded to my bargain FRsky £12 RX! Happy days!

[adam4308]

Could someone help me pls, iv done the frsky conversion on my ko type r, all
Works fine untill I'm about 10 meters away then it looses signal and I have nothing.

[john333]

Check that your wires and aerials are not touching any metal or carbonfibre for one thing, and that any solder joints are sound.

The other thing to check is that you are not in test mode (this is something to do with flying range checks etc) sorry cant remember how to get in and out of this. It hopefully you still have your instructions lol.

Other than that maybe faulty part? (doubtful though)

[adam4308]

Thanks John, it turns out its the ariel on the receiver that is faulty

[john333]

No worries, glad its sorted

[Moose]

I did some testing with the frsky DIY module and I am curious to know how you set up your radio using it.
I compare to the spektrum pro module and it feels much rougher on the straight, feels bit like setting the expo to the wrong side.
I did most testing with the newest VRC controller in VRC because it is just easier to switch modules and receivers than on the track.
I had the same problem using a Flysky GT3B but sorted it out slowing down the steering turn in speed very few %. Doing the same with the frsky module it helps but i had to increase much more % to get similar effect on the straight and it is too slow in the corner. I already tried the expo but no matter what I try, switching back to spektrum pro and I am instantly faster and more consistent no matter how I set the expo.
Already having a bit experience with the GT3B I can say the feeling is similar to a GT3B with an old software when latency was much higher.
I did all tests with the FrSky module in a M11. I havent compared with the old 40FM but I did when I switched to spektrum pro and back than I couldn t feeld much difference, maybe I will check that too if I get some time.
BTW: I used the pro receiver with the spektrum, did some testing with the old light grey receivers too but already sold them because they felt edgy and somehow unpredictable. Maybe edgy like the Frsky but the frsky feels much more predictable.

..sooo how do set your radio to fiy that ? I didn t try ARC jet, maybe a good solution ?

[john333]

I just wired it up, tested it and ran it in a race!

Felt great from the word go and not had any issues since, certainly haven't had to make any adjustments

[jamiew]

Same hear just soldered it in bound it to my reicever and job done

[traffman]

Jamie i would have your set up over my Universe any day!