Multifinctional radio

• current design is adapted to OrangePi Zero but can be migrated to use RaspberryPi ZeroW
• design for inner usb-hub is for non hub that I had laying around so provided link to usb-hub is just for reference
• based on the version of pc used for build wifi/bluetooth/dac dongles are not needed
• design for CD/DVD drive is for slim version of notebook drives
• for playback is used Volumio and Opi Zero uses img from Volumio Forum
• script for updating playback cover to display volumio-album-art.sh
• Opi Zero armbian config armbianEnv.txt
• buttons control clone/build WiringOP and afterwards compile gpio-buttons.c

How-To

• needed parts: PSU 12V2A, Amplifier, OrangePi Zero or RaspberryPi Zero, Flat USB-hub - optional, Wifi dongle - optional, USB audio card or DAC hat, TFT display, Bluetooth A2DP receiver - optional, StepDown module, RCA connectors, Power button, CD/DVD notebook drive - optional, IDE/SATA to USB - optional, Opi/Rpi fan, 6 pen springs, 4 Tactile Buttons, M2 screws
• print case as whole or as 2 separate parts based on your printer volume
• print all slider/pot parts 3 times, extends pots from amplifier with wires and mount them on sliders optionally add some grease
• print all buttons related parts
  • and add tactile switches to buttons-case and secure them with hot/super glue
  • add pen spring to buttons-case and slowly insert button, adjust the spring with pliers
  • repeat for remaining buttons...
• print all tape related parts
  • glue together tape-bottom and tape-top part add display to tape-tray add hot/super glue and cover with tape-tray-lid do not forget to pass display cables through tray hole
  • cut 2 short pieces of wire bend then around tape-tray-joint but let be loose they will be used as spring that opens tape tray
  • insert tape-tray with bended wires optional glue them to tray for ease of assembling lock wires to slots on tape-bottom and insert tape-tray-joints
  • sand down tape-lock-pin insert it to slot on tape-top part, cut in half pen spring and insert each half on pins on tape-lock-pin secure with tape until inserted into main body
  • add tape-eject buttons with spring and lock it with 2 pins from side
• insert pot sliders, amplifier PSU and buck converter into left part of case and wire it up together
• print remaining parts
• add usb-hub usb-bottom part
• add CD/DVD drive to case-right-bottom part and secure it with small screw from side
• add Opi Zero to right part of case
• add assembled buttons and tape parts and connect them to Opi Zero, optionally secure them with super/hot glue
• join usb-bottom, case-right-bottom and usb-top parts add all electronics to them like usb-hub, wifi-dongle, usb-dac and bluetooth receiver connect it to Opi Zero and insert int from bottom to right part of case and slowly slide it backwards... secure with screws from bottom
• add case-left-bottom part and secure it with 4 screws
• add back panel with AC socket, DC power switch and RCA connector that are connected to amplifier PSU and Opi Zero
• optionally print wall mount parts to hang radio on the wall

Wiring

PINOUT: Display -> Raspberry Pi Zero

• BL -> pin 12 (GPIO 18)
• SCK -> pin 23 (GPIO 11)
• MISO -> pin 21 (GPIO 9)
• MOSI -> pin 19 (GPIO 10)
• CS -> pin 24 (GPIO 8)
• RST -> pin 22 (GPIO 25)
• D/C -> pin 18 (GPIO 24)
• VIN -> pin 17 (3.3v)
• GND -> pin 20 (GND)

PINOUT: Display -> Orange Pi Zero

• BL -> pin 15 (GPIO 3)
• SCK -> pin 23 (GPIO 14)
• MOSI -> pin 19 (GPIO 15)
• CS -> pin 24 (GPIO 13)
• RST -> pin 11 (GPIO 1)
• D/C -> pin 13 (GPIO 0)
• VIN -> pin 2 (3.3v)
• GND -> pin 20 (GND)