Building Bluetooth Speaker From Old Stereo Radio Cassette Recorder

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List materials:
- Isolation Power Module B0505S-1W: s.click.aliexp...
- 5V 1A Micro USB 18650 Lithium Battery Charger Module + Protection Dual Functions: s.click.aliexp...
- Bluetooth audio receiver: s.click.aliexp...
- Mini power amplifier board: s.click.aliexp...
- 18650 lithium battery: s.click.aliexp...
- 2X 18650 Battery Holder: s.click.aliexp...
* Please check out these products:
- Retro Portable AM FM SW Tape Supports Wireless Bluetooth Speaker Multifunction Recorder Radio: s.click.aliexp...
- Riptunes Boombox Radio Cassette Player Recorder:amzn.to/3Caf1GP
- Victrola 1980s Retro Bluetooth Boombox with Cassette Player: amzn.to/2WPfRsq
- Studebaker SB2145B 80's Retro Street Bluetooth Boombox with FM Radio, CD Player, LED EQ: amzn.to/3rO33hg
- Riptunes Cassette Boombox, Retro Blueooth Boombox, Cassette Player and Recorder: amzn.to/37jiwMM
- Victrola Mini Bluetooth Boombox with Cassette Player, Recorder and Am/FM Radio: amzn.to/3ylgCXW
- GPO Brooklyn 1980S-Style Portable Boombox - CD Player, Cassette Player, FM Radio, USB, Wireless Bluetooth Speaker: amzn.to/3jh4cdx
- Supersonic SC-3201BT-BK Retro 4-Band Radio and Cassette Player with Bluetooth: amzn.to/3Ce89YQ
- QFX J-220BT ReRun X Cassette Player/Recorder Boombox 4-Band (AM, FM, SW1, SW2) Bluetooth Portable Recording Boombox with Dual 3” Speakers, Built-in Microphone, 3-Band Equalizer:amzn.to/3CdWpWj
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