Wishlist for a custom Transmitter board

It should be possible with some code changes. I've never used one so can't say for sure. How cheap is quite cheap? What size are you actually hoping to have? Got a link?

www.ebay.co.uk/itm/181943860531?_trksid=...e=STRK%3AMEBIDX%3AIT

2.42" 128x64

62mm x 38.8mm from what I can gather
(so about the same size as a Devo10)

At £17.55 I don't think its that expensive for what it is...I'm sure they could be found for less with some more hunting

Regards
Rob

Looks nice. We could give it a try, but I can't promise that we'll be able to get it working. I couldn't find any voltage information on your link. Could you check with the seller first? Preferably it works on 3v3 for both power and signals.

Alternatively the screen that 2hry showed in his pic a few posts ago looks to be about the right size also.

I think the 2.42" 12864 display uses a SSD1309 driver. I Found the info on a amazon.com listing and looks exactly like the ebay listing. I know this display is supported by the U8glib which I have used with arduino projects. I have attached a ssd1309 data sheet if this is helpful. It is way over my head. I usually just use libraries.

Thanks for the data sheet. It'll be useful if robocog decides to buy the display. It seems it should run on 3v3.

Have messaged the seller - still waiting to hear back
Have asked if they have a spec sheet and if it will run from 3.3v for power and signal

Will report back

Regards
Rob

Seller has kindly got back to me

They have sent a link to the specs
115.28.16.44:81/file/4269.rar

Quite a bit of bedtime reading!
(though I don't think it /all/ relates to this screen)

From the initial glance through some of the many files included - it /may/ require a 12v supply for operating voltage
(7v - 16v quoted in the DC characteristics section in one of the pdf's : SSD1309-Revision 1.1.pdf)

Possibly no good then :/

Regards
Rob

I really like these guys for displays: www.digole.com/

They are a bit more expensive than the generic sellers, but they have their own firmware that is very easy to program, and they have a very wide selection of displays.

@silpstream

Would you please compile me a Devo 7c version with modules enabled?
I built my rct board with very small display into an old transmitter, but it doesnt bind.

@2hry, here you go. It has everything enabled exactly as the devo7e-256, but built for SSD1306 and has flash detection.

@ silpstream
Thank you very much.

I just bound to a Dsm2 and a Frsky-receiver, and my H8mini.


The wiring is messy, but it works. Now waiting for switches.

Wow! Looking good. This might be the first fully working self-built deviated tx (at least I've not seen another yet).

Fantastic work 2hry!
Congrats

This is as far as I have got so far


I can't seem to save any settngs yet - but assume it is because I'm running off the USB and not yet implemented the power supply (with the A2 and A3 circutry wired up)

I can change model names and protocols and mixers etc via the buttons, but any changes are not saved after a power cycle

Slowly edging towards a usable TX...

Regards
Rob

@ robocog

Keep going, silpstream posted a schematic for the softpower circuit.

My Progress so far
As i wrote earlier, I have bought a used walkera transmitter(cyrf module inside!!!!! you´ll need one or a 4in1), and also a uc1601 display.
The stm boards are getting cheaper and cheaper, so another rct6 board for 7 bucks was slowly getting to me.

The softpower circuit was built with through hole component i had lying around, with some experimenting (the transistors didn´t switch as they should)
I haven´t written down the exact values of the resistors, but if you like i´ll open it again and check (Transistors: BC547, BC558,Mosfet: IRF9540). Saving is OK, but the voltage is a bit off

I´ll have to redo the switches anyway, because I had problems with the 3 way switches. There were some changes for the ultimate7e, that are not linked in the wiki. And a voice module would be nice too.



dont judge the picture: the wiring is a mess, just like the first transmitter

Got some pictures from China Deviation user,he tried to build a new Deviation platform, 3 way SW x4 + knob x2!
build in 4-in-1 RF module.

Intriguing... seems to have it all in one package! But that board isn't exactly DIY.

How would we have anything to mod?

That's my fault, it should not be a DIY TX....
I'll try to get more information about it and put it in right thread,thanks!!

Deal57 wrote: Intriguing... seems to have it all in one package! But that board isn't exactly DIY.

How would we have anything to mod?

Interesting development!

Some small Deviation boards + display module, but in order to be a success it must be at market cheaply!
I hope there will be a charge via USB and run on 1s or 2s, lipo or lion and include the df player chip.

Seems all is not working as I had thought
I cannot change anything written to flash memory (whilst booted into Deviation)

On my Devo 7e - (flashed deviation of course)
I can open a model, change its name and exit all the way out and it takes on the new name and any changes

DIY TX
STM32F103RC with the Winbond 25016DVSIG flash- it does not save any changes I make

I can read and write to the flash chip with enter held down at boot (from the boards USB port) , but switching to USB mode whilst booted up into deviation it does not show as a usable drive (I'm guessing I need to use GPIOA 11 and 12 tied to a USB socket for this to work ?)

Maybe I missed something obvious hardware wise?

Regards
Rob