Re guarding SI5351
Boards, I still have Bare PCBs that are stand alone I2C 5V
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
On 1/27/2018 7:40 AM, Jerry Gaffke via
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
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
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
The others come fully soldered up, which some may prefer.
On Fri, Jan 26, 2018 at 06:42 pm, Joe wrote:
I use the
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
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
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
PayPal ID "MotDog@..."