RDS-Radio made with MM100, MK190, Arduino Nano and LCD20x4

Modules Audio Hi Fi Projects
1

I made a radio with some Velleman modul / kit. It works fine!

There are two small issues:

  1. Display updates produce a noise. One can hear it when music or speech is quiet.
  2. A station at 96.00 MHz is noisy (in stereo mode) although its signal is strong maybe arduino’s crystal 16MHz is causing this?

Schematics:

Schematics
Schematics874×652 545 KB

Has anybody an idea if I can improve these issues by some capacitors?

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2

I could fix the issues described above by using some capacitors and using some ferrite core. the wires to the LCD are now winded a few time around the ferrite core and the capacitors are parallel to its VDD and GND. The antenna cable needs to be in a distance to the arduino.

Thanks Velleman for such cool kits and modules.

https://raw.githubusercontent.com/chuebsch/RDS-Radio/master/tuned.jpg(image larger than 3072KB)

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Awesome I love it.
Great to see the products you design being used!
Thanks for sharing!

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