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New version of TFT Touchscreen based VFO-BFO for uBitx

SP Bhatnagar
 

Dear All uBitxers,

A new version of software for low cost mcufriend TFT with Touchscreen based VFO + BFOs is out now along with an illustrated manual. This version (3.1cU) provides a row at the bottom to set / adjust both BFOs, PTT type selection (Toggle or Normal) , auto Time out duration setting , individual Offsets for each band, Touch Sensitivity, Lower and Upper limits for displays of S-meter and Power meter. Of course it continues to provide 3 VFOs (A/ B and Memory -100 channels), Direct Band selection, LSB/USB setting, Setting the frequency change step size from 1 Hz to 1 MHz, exchange of frequency between VFO and Memory, Saving all parameters on Demand , Split frequency operation, auto band Up /Down scanning and CAT control.

This system uses standard Arduino Mega board with compatible MCUFriend type TFT / Touch shield and either a standard Si5351 breakout board or one designed specifically for it which replaces Raduino board. This combination makes it very simple to assemble in a short time. Please note that this is only for experimenters who have some practical experience with Arduino and a bit of Hardware and keen to learn. There is no ready-made Kit as of now and all information is already available on our blog "vu2spf.blogspot.com" and on Github "github.com/sprakashb" . If there is someone willing to kit it for Ham friends I will be too happy to help.

Wishing you a great homebrewing experience,

VU2SPF,
SP Bhatnagar

GM4CID
 

A very interesting uBitx touch-screen controller using the Arduino Mega 2650 with many useful features, an excellent alternative to the Nextion with the option to add push button switches for your favourite functions.

freefuel@...
 

is this a nre controller board, or using the standard Arduino mega board? 

-Justin N2TOH 

Joe
 

Standard atmega 2560


On Sun, Aug 12, 2018 at 3:23 PM <freefuel@...> wrote:
is this a nre controller board, or using the standard Arduino mega board? 

-Justin N2TOH 

Kevin Rea
 

hi,
Does this work with the Nextion Enhanced 3.2" screen ?

kevin rea
lancaster, calif.
k6rea

GM4CID
 

Hi Kevin,

The VU2SPF solution uses the MCUfriend type low cost touch tft which plugs straight into the Mega 2650 rather than the serial Nextion display.

73

Bob GM4CID 

Kevin Rea
 

Hi Bob, so does that type of screen come in a 5-inch screen that the software will support?

GM4CID
 

Hi Kevin,

SP may correct me but I believe the current sketch out of the box supports a screen resolution of 240 x 320 which may limit you to a 2.8 inch screen size maximum.
I have had a 3.5 inch 320 x 480 TFT working after adjustments to parts of the sketch. so it would not be impossible to use a 5 inch screen if you are prepared to tailor the sketch for that screen resolution.

73,

Bob

SP Bhatnagar
 

Bob is right. There is some experimentation needed to use larger display. I have not tried any larger ones yet.

My main concern was cost, so never looked at larger displays. 

73s
SP Bhatnagar
Vu2spf

Jack, W8TEE
 

Costs vary greatly with larger displays. One reason is because many of the less expensive color displays push the display processing onto the main processor while others use the hardware on the board. Also, many displays either do not support touch screens or there are no third-party libraries for them. Some displays have less resolution than others.

The display we are using in our forthcoming JackAl board comes in either 5" ($34) or 7" ($44) size, uses the RS8875 via SPI, has 800x480 resolution, and uses capacitive touch:
Inline image
By pairing it up with the Teensy 3.6 µC with 1Mb of flash, 256Kb of SRAM, and clocked at 180MHz, we can do DSP that many other processors cannot. (The photo shows the SSB in GREEN and its choices of filters have selectable bandwidths of 1500, 1800, 2200 (selected), 3000, and a user-defined custom (Cust) bandwidth.) We also provide about a dozen free !/O pins to play with.

Our board will likely cost more ($30) than a Nextion display system, but we think its features and horsepower will bring a lot to the table.

Jack, W8TEE

On Saturday, August 25, 2018, 4:19:49 AM EDT, SP Bhatnagar <vu2spf@...> wrote:


Bob is right. There is some experimentation needed to use larger display. I have not tried any larger ones yet.

My main concern was cost, so never looked at larger displays. 

73s
SP Bhatnagar
Vu2spf