Bluetooth iPod Classic 4th Gen Tutorial In Depth

How to add Bluetooth to the iPod classic 4th gen.

Links to buy the parts used here (affiliate links):
Bluetooth circuit board: https://s.click.aliexpress.com/e/_EJlSztF
TZT B0505S-1W 5V to 5V converter DC - DC isolator: https://s.click.aliexpress.com/e/_EyRh4Gz
DS lite button: https://s.click.aliexpress.com/e/_mO3YEuo
wire: https://s.click.aliexpress.com/e/_EH48iOp
3000mah battery (for classic 5, 6, 7): https://s.click.aliexpress.com/e/_Ex2owgl

3d print STL file for the button: https://www.thingiverse.com/thing:6799300

Links to other ipod parts here:
https://partspluspods.com.au/product-category/ipod_parts/

Links to book a mail in bluetooth upgrade service:
https://partspluspods.com.au/product/ipod-classic-5th-gen-bluetooth-upgrade/

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