nobchaDetailed source code, assembly manual, and full schematic analysis are archived on my tech blog: [https://nobcha23.hatenadiary.com/entry/2024/09/04/201324],[https://github.com/Nobcha/R909-SDR/tree/main/R909_manual03_en.pdf],[https://github.com/Nobcha/R909-SDR/blob/main/R909-DSP3_test1.ino]
Details are on my blog and GITHUB
A project log for I Built an Airband Receiver Around a $1 Radio IC
What happens when you combine the RF section of a cheap portable radio with a modern DSP receiver chip? TA2003&Si4732.
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