Wishlist for a custom Transmitter board

I also got my working partly, cant get it into dfu mode, usb mode works, heave to connect isp flash. is it somehow possible to disable CYRF6936 module, I don`t want to use one.I need only A7105.

you use www.deviationtx.com/media/kunena/attachm...d3bed_2017-05-14.zip

I thought I post it here, but I came across nice E-ink displays, possibly nice option for the custom DIY transmitter?

www.banggood.com/1_54-Inch-E-ink-Screen-...ml?rmmds=newArrivals

I think it's too expensive,
I think maybe we can use sh1106 1.3inch. but i'm getting 2 pixcel errors ,i can't fix it

Is there a repository with code and documentation which hardware to use?

You re-read the previous page will have

Hello everyone,

i appreciate a lot the work of all of you programming this great firmware. I como from Spain and i am now living in Germany. Here where i live i could buy for a couple of months an old Walkera transmitter (WK2403). I am trying to modify it with deviationtx. The development board that i am using ist based on the STM32F103RC. RF Modul ist the TI cc2500. I havent built the power circuit yet. I got everything working but the keys. The up Key is not working. I can only go down on the menus. I got the matrix scheme from the hardware wiki. What did i do wrong?

Thanks in advance.
Best regards,
IeC

you have already connected a3 to gnd before turning on tx
b6-c7 ent
b8-c9 ext
b8-c7 dow
b8-c8 up
b6-c8 R
b6-c9 L

Hello phamminh,

thanks for the fast reply. I double checked the connections and are like you wrote. PA3 is connected to gnd. What else could it be? Coud i modify the model.ini in my computer to assign switches to channels to avoid using the keys? It wouldnt be really practical but as a solution solution could it work?

Thanks and best regards,
IeC

First, check if the switch pins and trim pins are connected, try disconnecting those pins, just connect the pins, ext, R, L. and leave the file ini to the original and You should also check if the connection wires are broken

Thanks again!. I desoldered all the clables and tried with alligator cables and now it is working. I have soldered the cables again and it is again not working . I think that the cables are too long or there is some emv between the cables. It is really strange.I dont know if it would be better to solder the cables directly to the board.

Best regards,
IeC

i'm going to prepare a kit list to repair my devo 7E (cause of a white screen and lot of strange electrical things).
i wonder if i can use the original pcb with screen and buttons and connect it on the STM32F103RC board. What do you think of it ?
in second time, use the 4 in 1 module and finaly, use a cable inside to move the usb to external and work about use empty space.

Can i use wiring diagram of the Devo 7e to wire everything or i miss something ? and i've missunderstood : what firmware have you finaly used ? if i wire like the devo 7E can i use the devo 7 5.0.0 ?

Thank's for your answer, your custom-made rocks !

how to make devo 7e-256 new release firmware with oled display ? What scripts should I change before compiling?

After some test and good result, i have decided to produce a board to make it easy. It was think to re use some parts and componants (like the screen, usb port, smds...) and a STM32 Mini V2.0 with 4 in 1 module and make easy to mod with the "extension" pins. I haven't placed the haptic motor but you can drill or glue on it. I add all the stuf need to use a lipo 1S battery (with protection, 5V booster, charge by USB and monitor by the chip and extra led if you want). If you cant sold those component or you prefer use pre made part, sold it directly with the power switch (but supply 5V regulated at this point, it use to supply board, radio, buzz and haptic, 3.3V conversion is made by the board).

Any suggestion are welcome

Sounds great. What TX's would it be compatible with ?

this : www.banggood.com/fr/CC2500-NRF24L01-A710...BwE&cur_warehouse=CN but if i use wire istead of jhead pin i can use something else

Nice Job !

You could also pinout some plugs for the 2 extra Pot's / ADC.
And or some extra switches. Possibly easiest to use the 7e 256 or Jumper T8SGV2. What display you'll use ?


Btw the RF module from your link is very expensive....You can buy even complete universal TX unit voor much less...
www.banggood.com/fr/URUAV-TMX5-4-IN-1-A7...10&cur_warehouse=USA

Yes but this module is made for a special transmiter and can't be use in the devo 7e (except if you disasemble it maybe)

Today i've test my solution for power supply and it"s not enough (1S lipo with 10A45 to boost to 5V but it provide only 150-180mA) this night i'm going to test other clue in real situation.

Sorry, havent seen your first question.

The screen is the original, unsold from the original board.

And for extra you can make it done with the 10 pin (extension on rigth) providing 5V, 3v and unused (or not found on my wire plan :/) PC12 PA4-0-8 PB4-9-3
I ve solved my problem : one 10A45 for the buzzer and the board, another dedicated to the radio make it work during 4hours easily with 1S 850 mAh in not intensive use (model close and just switeched on)

i'll make change needed on my schema tomorrow and maybe add pins for a SSD1306 (i got one too) on back of the board, base the mapping on previous work
(CLK -> A.5
MOSI -> A.7
RESET -> B.1
D/C -> C.5
CS -> B.0)

at the end (in 2 or 3 day i guess) i send to my favorite factory (no joke, i frequently send my project there) and if it was a succes, release my project file (eagle format)

After some tests (butons, place, screen, holes, etc...) it's done. I've add :
* some tests pad for pins i have no clue to use (but not supposed to be free)
* Power regulator place (AMS1117-5) to shutdown power of input charger (in back of the controller) it's for 12V max and used to supply. It require to not plug cathode battery to the pcb of the charger but directly to the pcb controller (by default it made common ground but it's not made for lipo after all)
* Adding pad to use DD0505MC ( ae01.alicdn.com/kf/HTB1XtyOKXXXXXaYaXXXq6xXFXXXc.jpg ) istead of sold it directly on the pcb (if you cant or just lazy but not crazy )
* It's possibe to use a buildin plate to charge battery. You have place to glue it on the pcb
* Adding pin for SSD1302
* Adding cosmetic tag