/cd30mp3_keyboard

This is an Arduino project to make an old analog radio interface work with my astraDash raspberry build

Primary LanguageC++

Astra H DELPHI GRUNDIG cd30mp3 as hid usb keyboard

Hardware:

  • Arduino pro micro
  • 2x 104 ceramic capacitor
  • 2x 100ohms resistance
  • 2x 10kohm resistance
  • colored wires

Steps done:

  • I've disassembled the panel and I've measured resistance between contacts
  • I've soldered 16 colored wires to the panel connector contact points
  • I've found on the russian forum drive2 this image to understand fully how leds and rotary encoder works
  • More info in the cd30mp3_keyboard.ino file

colored wires to the panel connector contact points

contact scheme1

I've used the two 10kohm resistance as pull down resistance for the encoder A and encoder B pins, and the two 104 ceramic capacitor as filter to clean signal, the two 100ohms resistance are used between the pulldown resistance and the signal filter to connect them in series

Final result, I've had to solder USB wires directly to the board because the micro USB port came off

Led brightness control

echo -n 255 > /dev/ttyACM0

Footnotes

  1. Image of the contact scheme taken from: https://www.drive2.ru/l/8687044, all rights reserved. ↩