CentSDR (9) : Nucleo or ST-Link/V2 writer is required

Nucleo or ST-Link/V2 writer is required to write the firmware in MCU. Either one will be bought for the next step.


Anyway, for soldering, those printed texts for C6 and C34 on board should be corrected. Those texts should be swapped.

CentSDR (8) : Soldering is ongoing

Soldering for SMD parts are ongoing. There are still a few parts to be put on the board.


The connector for ST-LINK will be attached to write the firmware.

CentSDR (7) : Soldering has been started.

Soldering has been started. Since those parts are small, I should have the soldering carefully. Here is the first soldering and still few parts on the board.


The parts sheet in the attached picture showed "U7" but VCTCXO 26MHz should be "U3". "U7" should be Si5351A-GT since the part list and circuit diagram in the manual describes it.


Anyway, this board got 3.3V on the output pin of voltage regulator
and also the 26MHz signal on the output pin of VCTCXO.

CentSDR (6) : LCD has been received.

The TFT LCD has been received today. It's very fast to delivery the parts. It's recommended to show CentSDR output.

• 2.2" inch TFT LCD Display SPI ILI9341 240x320 for 51/AVR/STM32/ARM/PIC Arduino (ebay)