Hi guys, this video shows you how to upgrade the Bluetooth board to any cassette radio player you have. Thank you all for watching the video and don't forget to support me by channel subscriptions. Good luck
How to Hack Mp3 Bluetooth For Old Radio Cassette
Ways for your reference
_1: Find ahead from an old cassette and follow the instructions in the video: 1:32
_2: Solder the output of the Bluetooth circuit directly to the magnetic head. Remove the ic preamplifier out of the circuit, then look up the ic pin connector on the input signal and output signal pins: 15:45
_3: Connect the signal wire directly to the circuit board at the output ic pins: 25:23
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