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Simple Bluetooth speaker (with instructions and parts list)

Small, working Bluetooth speaker. Parts listed in the description.
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updated May 27, 2025

Description

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Small, functional Bluetooth speaker, consisting of a battery holder, amplifier, bluetooth module, and a speaker. No supports are needed for printing the box; however, a brim may be useful for the feet. I glued the speaker and the battery holder into the box using hot glue. The front is also glued to the main body. Links to the electronic components:

BT-Modul: https://de.aliexpress.com/item/1005007010645054.html?spm=a2g0o.productlist.main.18.2dccRObpRObpwu&algo_pvid=655834a9-ea08-448f-a275-26f96be46c77&algo_exp_id=655834a9-ea08-448f-a275-26f96be46c77-17&pdp_ext_f=%7B%22order%22%3A%221824%22%2C%22spu_best_type%22%3A%22price%22%2C%22eval%22%3A%221%22%2C%22orig_sl_item_id%22%3A%221005007010645054%22%2C%22orig_item_id%22%3A%221005008318020108%22%7D&pdp_npi=4%40dis%21EUR%212.90%211.39%21%21%2123.18%2111.11%21%402103867617466298670981882e3de2%2112000039050839080%21sea%21DE%210%21ABX&curPageLogUid=gPFTZ4Blt5f3&utparam-url=scene%3Asearch%7Cquery_from%3A

or

https://www.roboter-bausatz.de/p/bluetooth-4.1-audio-decoder-verstaerker-modul-xy-bt-mini

Amplifier (PAM8403): https://de.aliexpress.com/item/1005008157122586.html?spm=a2g0o.productlist.main.25.70972e5469rxb0&utparam-url=scene%3Asearch%7Cquery_from%3Apc_back_same_best&algo_pvid=0e75d0ff-a372-43f3-8fc1-ce10c5f00a44&algo_exp_id=0e75d0ff-a372-43f3-8fc1-ce10c5f00a44&pdp_ext_f=%7B%22order%22%3A%22172%22%7D&pdp_npi=4%40dis%21EUR%210.74%210.65%21%21%210.82%210.72%21%40211b815c17466296295745176e1dd0%2112000044028267114%21sea%21DE%210%21ABX

or

https://www.roboter-bausatz.de/p/5v-audioverstaerkerplatine-pam8403-2-3w

Batterycase: https://de.aliexpress.com/item/1005004197639879.html?spm=a2g0o.productlist.main.1.5c36mgidmgidK4&algo_pvid=cb94f01b-c8b7-4432-904e-8990f86da026&algo_exp_id=cb94f01b-c8b7-4432-904e-8990f86da026-0&pdp_ext_f=%7B%22order%22%3A%2228%22%2C%22eval%22%3A%221%22%7D&pdp_npi=4%40dis%21EUR%211.39%210.99%21%21%211.54%211.10%21%40211b80f717466299148544754ead20%2112000028350237278%21sea%21DE%210%21ABX&curPageLogUid=4nNm6TiKzjE1&utparam-url=scene%3Asearch%7Cquery_from%3A

or

https://www.roboter-bausatz.de/p/batteriehalter-fuer-3x-aa-batterien-4.5v-mit-an-aus-schalter

Speaker: i used an old 55m (8ohm 2w) speaker i had laying around. 

You'll also need four M4 screws and nuts. Make sure to insert the nuts before gluing the front panel to the body.

 

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