Experimental Python-based RISC-V MP3 player concept using a Milk-V Duo / LuckFox Pico (64MB ideally, but most likely 256MB for extra headroom), an iPod clickwheel/case and either a 2-inch ST7789V-based SPI display with an HDMI redirect or a 2-inch Adafruit composite-based LCD.
Based loosely on code from the Retro iPod Spotify Project, but intended as an always-offline music player.
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Milk-V Duo 256MB / LuckFox Pico Max - $15
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2" display (either composite or SPI) - $15-$25
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MicroSD card (2GB or higher recommended) + microSD extender - $5-$15
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iPod case + functioning clipwheel (N/A)
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8-pin FPC cable breakout board (for clickwheel) ($10)
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Battery or power source of some type. (TBD)
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Total cost: $60-$70(?)-ish
https://www.shogan.co.uk/builds/spotipod-spotify-streaming-device-from-an-ipod-classic/