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Wednesday, January 31, 2018

CentSDR (5) : What's CentSDR?


CentSDR v0.1 is tiny SDR (Software Defined Receiver) and it's kit.

Characteristic

  • It is a palm size, standalone software receiver (SDR).
  • Frequency, mode, spectrum, waveform and others are displayed on small liquid crystal (2.2 inch)
  • All operations are done with one rotary encoder
  • It can be set with frequency resolution ≈ 1 Hz with PLL synthesizer
  • The characteristics are flat due to the wide band configuration and the circuit is simple
  • It is also possible to control via USB (CDC = serial)

Specification

  • Substrate: 57.8 mm x 87.3 mm (without connectors and switches)
  • Frequency: 0.1 to 50 MHz
  • Display: 320 x 240 pixels
  • Power supply: USB 5 V 100 mA
  • Supported modes: LSB, USB, AM, (NFM)
  • USB interface: CDC (serial)


Monday, January 29, 2018

CentSDR (4) : Three parts have been received today.

Three parts have been received today.

  • SI5351A-GT (Left top)
  • Rotary Encoder (Left middle and left bottom)
  • Pin Socket (42p) (Two for middle and right)


Since LCD was ordered to China via ebay, it takes a time to receive it.

Sunday, January 28, 2018

CentSDR (3) : Additional parts have been ordered.

Additional parts are required for CentSDR and have been ordered.


Nucleo or ST-Link/v2 writing adapter is also required to write the firmware code.
They are currently under the investigation.


Saturday, January 27, 2018

CentSDR (2) : The CentSDR kit has been received!

The CentSDR kit has been received and the attached picture is parts and board.It's a small board (85 mm x 55 mm). It costs 9500 JPY which is approx. 87.11 USD (Jan. 26, 2018). Before the building is started, the additional required parts should be ordered. They are 2.2 inch TFT LCD display, Si5351A, rotary encoder and pin sockets. In addition, the manual also told that Nucleo or ST-Link/v2 writer and its cable are required to write the code. Anyway this kit is now out-of-stock. I believe that many people would like to get this SDR kit.   IMG_4451.jpg

CentSDR (1) : CentSDR kit has been ordered.

CentSDR kit (v0.1) was distributed. It's a small SDR receiver and has Cortex-M4F 72MHz and TLV320AIC3204 for the stereo audio codec. SI5351A has equipped with the clock generator chip.

 This kit was ordered and has been shipped. As the manual describes, this kit needs additional parts and the writer to write software to the chip. They should be ordered soon.

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