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V6 TFT ADAPTOR by G8DJM


 

Thanks again for this david. This should fix most of our problems. Great work.

Best Regards

Brian_____MMOBEF

_______________________________________

David's original message:

?David S
9:29pm???

Hi all.? A belated Happy New Year.

There's been quite a few requests for help with the TFT for the V6, the ones available in the wild are hit and miss.? I've now got 5 of the 2.8 TFT obtained from 3 vendors over the last year or so.? They seem to be the worst thing out at raising ones blood pressure with frustration trying to get them to operate correctly.? Of the original 3 only 2 will ok correctly with the Blue Pill yet all of them are fine with a Teensy 3.2.

I have also been watching with interest progress of the code for the V5 and then the V6 with a view to upgrading my early V3, more frustration with both types of display.? The TFT would be a great addition, so that's the way I'm going,? hence ordering some new versions. I've spent a troubled few days trying to coax one of the TFT's no go, the code assembles loads correctly,the display is wired up ok, I know it functions with the Blue Pill so back to basics.

I tested the TFT with a level converter, easy to do and magically it functions. So her's my thoughts to share with others it may help. You can find the schematic here??/g/BITX20/files/V6%20TFT%20Adapter

This is intended hopefully to assist with the problems encountered when trying to obtain a suitable TFT to use with the Ubitx V6 code.? Very many of these displays available from China are advertised as 3.3/5v (operation ?), they will run with either a? 3.3 or 5v supply but will only work with 3.3v logic signals. When wired as in V6, and running the code, the display will show only a blank white screen.

?

The idea is that this should act as an interface directly between the lead from the raduino and the actual display in use, no messing about with your Raduino.

Hope this is helpful to someone.

David S


Terry VK5TM
 

Re the schematic, the 3.3v regulator is shown wired backwards.
--


 

Dont know how i missed that. Thanks Terry.

Regards

Brian_____MM0BEF


 

And thanks from David G8DJM.

Regards

Brian_____MM0BEF


 

Some of these displays dont play well with the onboard 3.3v regulator. Bypassing it and using an external 3.3v regulator eliminates any potential problems there.

Regards

Brian_____MM0BEF


 

David, what IC is used in the schematic?? I have a few of those TFT displays that will need the level shifter.? Thanks, Dale

On Sun, Jan 12, 2020 at 4:07 PM <mm0bef@...> wrote:
Thanks again for this david. This should fix most of our problems. Great work.

Best Regards

Brian_____MMOBEF

_______________________________________

David's original message:

?David S
9:29pm???

Hi all.? A belated Happy New Year.

There's been quite a few requests for help with the TFT for the V6, the ones available in the wild are hit and miss.? I've now got 5 of the 2.8 TFT obtained from 3 vendors over the last year or so.? They seem to be the worst thing out at raising ones blood pressure with frustration trying to get them to operate correctly.? Of the original 3 only 2 will ok correctly with the Blue Pill yet all of them are fine with a Teensy 3.2.

I have also been watching with interest progress of the code for the V5 and then the V6 with a view to upgrading my early V3, more frustration with both types of display.? The TFT would be a great addition, so that's the way I'm going,? hence ordering some new versions. I've spent a troubled few days trying to coax one of the TFT's no go, the code assembles loads correctly,the display is wired up ok, I know it functions with the Blue Pill so back to basics.

I tested the TFT with a level converter, easy to do and magically it functions. So her's my thoughts to share with others it may help. You can find the schematic here??/g/BITX20/files/V6%20TFT%20Adapter

This is intended hopefully to assist with the problems encountered when trying to obtain a suitable TFT to use with the Ubitx V6 code.? Very many of these displays available from China are advertised as 3.3/5v (operation ?), they will run with either a? 3.3 or 5v supply but will only work with 3.3v logic signals. When wired as in V6, and running the code, the display will show only a blank white screen.

?

The idea is that this should act as an interface directly between the lead from the raduino and the actual display in use, no messing about with your Raduino.

Hope this is helpful to someone.

David S



--
Dale Hardin
Elberta, AL?

--
Dale Hardin
KS4NS
Elberta, AL


 

Dale

I did this as a quickie using the 5 for 99c or so Chinese premade modules, like these.



There's no reason why you cant just roll your own though, I'm not doing this as a project, more to help on how to get out of this predicament with the displays.

Regards David S


 

Thanks, I just ordered two sets (10) from the ebay US site for $2.66. Doesn't make sense to roll your own.? Dale

On Mon, Jan 13, 2020 at 2:51 AM David S <dsatn04@...> wrote:
Dale

I did this as a quickie using the 5 for 99c or so Chinese premade modules, like these.



There's no reason why you cant just roll your own though, I'm not doing this as a project, more to help on how to get out of this predicament with the displays.

Regards David S



--
Dale Hardin
Elberta, AL?

--
Dale Hardin
KS4NS
Elberta, AL


 

Thanks again David,
I ordered some too (plus some 8 channel). Saves time soldering lol. Brilliant circuit.

73

Brian_____MM0BEF