61 lines
3.5 KiB
Markdown
61 lines
3.5 KiB
Markdown
title: Radio
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---
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I got an [Madeira 7.621.250](https://www.radiomuseum.org/r/blaupunkt_madeira_7621250.html) (to get some schematics you may wont to look at [Madeira 7.622.250](https://www.radiomuseum.org/r/blaupunkt_madeira_7622250762225.html)). I got an [Pi 3 B+](https://www.raspberrypi.com/products/raspberry-pi-3-model-b-plus/) with an [HiFiBerry AMP 2](https://www.hifiberry.com/shop/boards/amp2/). I soldered two cables to the existing solder joints on the speaker. This makes it possible to reverse the modifications I made with the PI, as it did not damage the “original” radio. I then screwed these cables, as well as the cables from a 12 V power supply (make sure it has sufficient amperage), into the AMP2's luster terminals. I also connected an [LM2596S](https://www.az-delivery.de/en/products/lm2596s-dc-dc-step-down-modul-1) module to the 12 V power supply, which I later used for the neon pixels. Presumably, the few WS2812 LEDs should even be able to be supplied with sufficient power by the PI itself.
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The radio has two light bulbs that are used for backlighting the scaler. I attached two [NeoPixel sticks with eight WS2812 5050 RGB LEDs (DEBO LED NP8 2)](https://www.reichelt.de/de/de/shop/produkt/entwicklerboards_-_neopixel_stick_mit_8_ws2812_5050_rgb_leds-240688) to the light bulb mounts, also in such a way that the original light bulbs are not damaged. I connected these to GPIO 12, making sure to note which GPIOs are [used by the AMP2](https://www.hifiberry.com/docs/hardware/gpio-usage-of-hifiberry-boards/) and where a digital converter is still available. This completes the hardware modifications for the first version.
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## AMP2 and MPD Setup
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There are a log of different tutorials how to connect the AMP2 to the PI. For me the following steps works:
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Edit the `/boot/firmware/config.txt` file by disabeld the audio=on and add the amp overlay:
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```
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# Enable audio (loads snd_bcm2835)
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//dtparam=audio=on
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dtoverlay=hifiberry-amp2
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```
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with this change (and after a restart) i could run `aplay -l` and got the following output:
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```
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**** List of PLAYBACK Hardware Devices ****
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card 0: vc4hdmi [vc4-hdmi], device 0: MAI PCM i2s-hifi-0 [MAI PCM i2s-hifi-0]
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Subdevices: 1/1
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Subdevice #0: subdevice #0
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card 1: sndrpihifiberry [snd_rpi_hifiberry_dacplus], device 0: HiFiBerry DAC+ HiFi pcm512x-hifi-0 [HiFiBerry DAC+ HiFi pcm512x-hifi-0]
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Subdevices: 1/1
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Subdevice #0: subdevice #0
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```
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The next step was to install the MPD by calling `sudo apt-get install mpd`. To allow the MPD to connect to the pipewrie it need to run in the user account, so I enabled and start it with the following commands:
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```
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systemctl disable mpd
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systemctl stop mpd
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systemctl --user enable mpd
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systemctl --user start mpd
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```
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inside the mpd config `/etc/mpd.conf` i enabled the audio output for pulse/pipewire
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```
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audio_output {
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type "pulse"
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name "My Pulse Output"
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## server "remote_server" # optional
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## sink "remote_server_sink" # optional
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## media_role "media_role" #optional
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}
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```
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and change the path to my mp3 files. As MPD Client i use [rmpc](https://mierak.github.io/rmpc/) on linux as cli client and [M.A.L.P](https://gitlab.com/gateship-one/malp) from fdroid for android. And also a [Light switch](/projects/homeassistant/random-audiobook-mpd.html).
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## Setup Neonpixel
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I want that the Radio turn the radio just on if the MPD is playing something. So i use [this python script](/projects/radio_led.py) that will show and rainbowl animation if the mpd is currenlty playing and turn the leds of if the music is paused for more than one minute.
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