Sunday, September 2, 2018

2nd lot - CentSDR (4): VCTCXO has been attached.

26MHz VCTCXO has been soldering. The board shows U3 for VCTCXO. The manual should be correct with U3 since it is U7.

The output of VCTCXO has been checked with 26MHz and approximately 0.8Vp-p.

Sunday, August 19, 2018

2nd lot - CentSDR (3): First soldiering and got 3.3V

My building process is very slow since there were other things which should be progressed.

The first soldering has been done. USB connector, switch, U9 and D4 have been attached to the board. USB connector should be carefully soldered since the connector needs to be attached to the board with the bottom face. It's most difficult part of the soldering in the kit assembly.

After this soldering process is finished, the USB power (5V) should be supplied with the USB connector. Once the power switch is moved to "On" side, 3.3V should be generated after the U9. This 3.3V power will be supplied to all parts in CentSDR. Thus the first test to get 3.3V is critical to go further steps.

Saturday, July 14, 2018

2nd lot - CentSDR (2): Additional parts have been collected.

As the posted message describes three additional parts for 2nd lot of the kit. They have been collected today.

The LCD display - "2.2" inch TFT LCD Display SPI ILI9341 240x320 for 51/AVR/STM32/ARM/PIC Arduino" was ordered via eBay. It takes 1 week to receive the LCD display.

There is the assembly document for the kit. It is written in Japanese. As the international order is accepted, the English version might be prepared.

STM32 F303CBT6 is CPU to manage all processes and TLV320 AIC3204 is I2S codec to make the audio output from IQ signal. Those parts should be attached to the board.

Friday, July 6, 2018

2nd lot - CentSDR (1): The kit has been received.

The CentSDR kit - 2nd lot has been received today. It is a tiny SDR receiver with the wideband coverage. The board is smaller than the first lot but other parts are almost the same. The attached picture is all parts and the board in the kit.

The additional parts should be purchased soon. They are :

  • 2.2" inch TFT LCD Display SPI ILI9341 240x320 for 51/AVR/STM32/ARM/PIC Arduino
  • Rotary Encoder (Recommendation is Akizuki P-05771)
  • Pin Socket (Recommendation is Akizuki C-05779)

Tuesday, July 3, 2018

"CentSDR 2nd lot" : My order has been accepted.

My order for CentSDR 2nd lot has been accepted. The 2nd lot has some minor updates with the smaller board. I hope that it can be received soon. The price is 9,700JPY for the domestic shipment (approximately 87.7 USD).

Those who are interesting in CentSDR. You can check the following URL with "For International Customer". The method of the order is described in English.

Sunday, July 1, 2018

"CentSDR 2nd lot" : The order starts accepting.

The 2nd lot for CentSDR starts accepting the order.
Please see the following URL:

> For International Customer
> International order is acceptable.

The good news is that the international order can be accepted. You can contact to know the order of this kit on URL.

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