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Sunday, February 25, 2018

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.

Sunday, February 11, 2018

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.

Sunday, February 4, 2018

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.


Thursday, February 1, 2018

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