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I'm also interested for more details about the LDO regulator mod. I saw once one on rcgroups with a detailled powerboard redesign, but couldn't find it anymore.

I found this picture in rcg (I should read the whole thread from there).
So are those pins only for firmware upgrade ?

Easystar, where are you located in Europe ?
There should be at least one Turnigy/Eurgle/FlySky 9x owner in each RC field
Ask him help.

Also, maybe open the module and check the antenna wire. It might be cut or badly soldered.

English is not my mother language, but that's a detail
So OK. I guess I need some access and howto.

ShowMaster wrote:...
The stock backlight has 2 leds wired in series with a 470 ohm resistor to limit current.
...

I think they are parallel, not serial.

I would say BS270 pins are out of order. A picture or at least a diagram of your connections might help.

I finally did the speaker mod. This thread helped a lot. Some pictures and vids from there shoud go to wiki IMO. The speakers inside the toys were all magnet speakers, like 8 ohm 0.25W. So I chose the high impedance Dell mb speaker. Same dimensions and look than the 9x beeper, but it's a piezo speak...

Just discovered this interesting thread !

agusta600gt wrote:hi there...

is there a way to have the same alarms as frsky in stock er9x?

like choice of bootsound,
counter alarm choice,
alarm choice ect.

cheers

+1

Otherwise, any progress on the mp3 stuff ?

Well, I'm not convinced by the PiSpkr. Still almost the same kind of sound.
What should be the difference, is there any youtube (with sound) vid for comparison ?
Thanks.
EDIT: ok, found this.

In stat screens some values are overlapping text.
EDIT: stat2 screen more specifically. Design feature or mistake ?

OK thanks.

I'll try the PiSpkr as is first.

I'll check the Dell cylinder with a dry 1.5V cell. I measured about 49 ohm with a multimeter. It should not sounds if it's a speaker, right ?

I'll see what's inside the other toys.

A fan.

Could low voltage be a cause for the drift ? The original poster said he uses 2s...

I did some search but I couldn't find any detailed info about the speaker mod. It looks like as obvious to you that there is no much to say. So I'm confused. First, what's inside the 9x that makes beeep if it's not a "speaker" ? I'm assuming that the beeper is monotone, it only makes beeep...

Could "durex play vibration" motor be used ?
Motor and battery are sealed so once battery is dead motor could be "reused" elsewhere.

I have the DHT-U.
It has its own screen.
Still could it be used for the frsky/telemetry mod by displaying and beeping info on 9x screen ? (DHT-U screen would be redundant but it doesn't hurt)
Thanks.

If you are looking something different in an rx... these are compatible to any tx that works with the above v2 rx's 5 in 1 Main Control Unit Helicopter 5 in 1 controller 5 in 1 Main Board I've tested them all, and they work marvy. Sorry, I'm late ;) Those micro-boards are for helis, so I guess quit...

I'm not sure to understand what was and what is.
But I should just know that, from current and future er9x releases, servo travels (or throws, or ranges) are/will be the same for all protocols, and we should take care with those linear micro servos, either from horizonhobby or hk supermicro. Right ?

Sorry, but, where in those numbers I can see the difference experienced from a DSM transmitter (the DX6i) ?

May I jump here and try to understand what is this about ? I have er9x-r760 and just used it for the first time in actual conditions with a plane that was previously bound with a DX6i. Using the 9x resulted in much more servo travel. Not an issue for this plane, but it will when I'll use spektrum's ...

There are at least two reasons for using supermicro with Spektrum transmitters: channel order (TAER) and servo limits.
With 9x stock firmware throttle can't be set to ch1. With er9x, servo travel must be limited to 70-75%, otherwise the tiny linear servos may fry.

By the way, I'm using two A123 M1 2300mAh LiFe cells with a LDO regulator in my 9x. That would be the definitive best choice if the stock 5V linear regulator is a LDO one. Is this the case or did you changed it ? If it isn't LDO, could we insert and additional LDO regulator in parallel with the ori...

kaos wrote:HOw do you use a satellite rx without a main rx?

See this rcgroups thread.

http://www.youtube.com/watch?v=JD1eePVWqoc

I would say 120 Ohm, but 100 Ohm should be OK.

I did the mod this WE with 3.3V, 22 ohm and a blue backlight. It's bright, maybe too much !

Spektrum Airmod might be the cheapest option to get 7-8ch, and you get a 7ch rx with it. Also plug & fly, no modifying/soldering required, but no model match and less fun ;) Purchasing them is another issue, but it looks like Spektrum is still distributing them. I got the HP6DSM for 20€, cheap ...

LED voltage is 2.84V under 19mA current on my blue backlight.
I will use a 3.3V regulator and 22 ohm: constant brighness regardless battery.

Thanks. I know that helifreak thread, I removed the 2 wires inside the HP6DSM. It might work for sim but it doesn't in master/slave training configuration with the 9x. I prefer switching regulators over linear, unless the ripple noise is an issue. I guess it's OK as on the wiki there is an explicit ...

I couldn't use the HP6DSM as a trainer tx (master), no way to find the exact pinout meaning of its rear 3.5mm plug. I'll extract the rf module from it, and do the mod as it should. Thanks for enlightening my mind :) BTW, is the hobbyking 3.3V switching regulator a good choice ? I have one that deliv...

Once bound, a satellite-rx can be used alone without its main rx.
Red-black wires must be 3.3V, white is PPM out.

I saw you have an 8 bit storage limit. I suggest 4 ranges that uses each 64 values (64x4=256, that's within 8 bit limit) 0- 63m in steps of 1m (we are limited to 50m in some places in EU) 64-190m in steps of 2m (ok for 122m) 192-444m in steps of 4m 448-952m in steps of 8m (enough IMO for extreme gli...

Malcurin wrote:in er9x you can assign the light to any switch in the left menu thing down where there is also a timer and stuff including turning it off perm there i belive using one of the switches in that menu

That's one switch less for programming. But OK, I could never have to use them all.