Re: UBITX Touch Control TFT Display


Michael Hagen
 

Re guarding SI5351 Boards, I still have Bare PCBs that are stand alone I2C 5V driven.

They can have headers top or bottom for connectors or plug in.

They both have proper level translation for I2C with 3.3V regulators.

The larger one is Lotsa Clocks, has the 20 Pin SI5351 with extra address jumper and 8 Clocks.

Here is a picture of them.  Bare and stuffed.

The bare PCB is $4 and $6 for Lotsa Clocks.  Include postage US and PayPal.

email me direct if interested.

73's

Mike, WA6ISP


On 1/27/2018 7:40 AM, Jerry Gaffke via Groups.Io wrote:
I had never heard of elegoo.com, that looks like a good steer.
They have some nice Arduino starter kits.
However, their 2.8" TFT display is not well documented, and burns an awful lot of pins.

Here's a reply to a question up on Amazon:  https://www.amazon.com/ask/questions/asin/B01EUVJYME/4/ref=ask_ql_psf_ql_hza?isAnswered=true
      I just went through all of the pins marked on the board and the code for the support libraries.
      It appears that the display hogs all of the pins with the exception of the A5 and the serial I/O pins 0 and 1.
      This pretty much precludes the use of any other peripheral devices using Wire, SPI, or I2C.
      The SD card uses digital pins 10 through 13, so if you don't need the SD card, you can snip those pins off
      (and don't include the SD library in your project). Otherwise the options are limited.

Not what I'm looking for.  
I'd prefer a display with just a 4 wire SPI interface, and power and ground.
Recommendations solicited.

Regarding the si5351 PLL chip breakout board, in addition to adafruit.com, there is also etherkit.com and qrp-labs.com
Hans of qrp-labs is active on this forum, a kit for his board is $7.75
    https://qrp-labs.com/synth.html
The others come fully soldered up, which some may prefer.

Jerry, KE7ER




On Fri, Jan 26, 2018 at 06:42 pm, Joe wrote:
Brein,
 
I use the following: HARDWARE
 
DISPLAY - Optimum size - 2.8inch TFT - I have tried several types and sizes from various companies - hit and miss. some work but poor clarity etc.
 
Having used the elegoo 2.8 inch  TFT Display with pen - from "amazon" has resulted in 100 percent working, clear, clean, crisp displays.
I have ordered 4 over time and quality is persistent. Price  around $15.00 shipped.  Best choice
 
 
Arduino Module : Atmega 2560 - Ebay is cheapest source at less then $10.00...  Any Atmega 2560 will work..
I have many different company modules and have found they all work great...
 
DDS module -  SI5351  module (not just the chip)- available from Ebay or Adafruit direct or amazon around $11.00
 

-- 
Mike Hagen, WA6ISP
10917 Bryant Street
Yucaipa, Ca. 92399
(909) 918-0058
PayPal ID  "MotDog@..."
Mike@...

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