The IC BK1088 from BEKEN is a complete radio receiver (DSP) that has a differential, as it comes with a Noise Blaker, which greatly reduces the noise of electrical interference. In addition it has excellent audio quality, very close to analog receivers and high cost SDR. The control (reading and writing of data) is done via the I2C interface, using an Arduino. This allows, for example, to read the reception frequency.
Although this CI does not have SSB demodulation, it provides excellent listening in Shortwaves, Medium AM and FM (Stereo), allowing the construction of a good receiver for radio listeners.
I programmed all the routines for reading and writing the internal registers of BK1088 (via I2C) directly in Sketch in a simple and direct way, not requiring the use of any specific library for BK1088.
I used the standard Arduino Uno to control the BK1088, in an extremely efficient and simple way.
I bought the BK1088 on Aliexpress. It has a SMD SSOP 20 enclosure, so I designed and manufactured a breakout board at home, including the oscillating crystal (32768kHz) and main SMD capacitors. 73!
Note: was used a poor antenna (randon wire with 7m long) and still need a LNA (RF pre-amp for antenna signal), even so, it is possible to receive a certain quality in the entire FM band. Some FM stations are local, others are 70km away.
30 июл 2020
