This is a simple SDR receiver based on Elektor SDR module and other two modules: Arduino UNO and DF Robot display & buttons for controller. The SDR_RX_Connection.jpg image and other pictures and video show how to build and connect all the modules.
NOTE: The last update add a the new tuning functionality, you need a 50K linear potentiometer that feed into A1 pin the analog voltage to use in tuning feature.
Use the full clockwise and full anticlockwise positions for automatic scan features, internal potentiometer position allow a fine tuning of about 1 KHz.
To built the SDR receiver you need 3 modules:
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Display LCD keypad shield by DFRobot, available on more online shop. Here the infos: https://wiki.dfrobot.com/LCD_KeyPad_Shield_For_Arduino_SKU__DFR0009
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A standard Arduino UNO Board;
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The Elektor SDR Shield v. 2.0, available on Elektor shop.
Video sample:
https://www.youtube.com/watch?v=fK46EtHxzpY
https://youtu.be/tYXyXMVJ2Fo?feature=shared
https://youtu.be/QclouFJjIl8?feature=shared
Best 73 de ik8yfw Giuseppe.