What is it?

A breadboard friendly adapter for bluetooth modules based on bekken corp bluetooth chips (BK8000L and BK3254). The adapter fits into the breadboard and leaves one row of open holes for connecting cables, making prototyping very easy. But, the board is not ideal ... I did make a mistake and accidentally flipped the silkscreen from right to left, so the pin names on the left side are actually for pins on the right side and vice versa. Because of this, the price of the board is the lowest as it can be on tindie, and it's listed on flea-market. Otherwise, the board is perfectly functional.

I personally tested it with a BK3254 module:

• as a2dp receiver for music listening

• SD-card support on BK3254 module (BK8000L does not have sd card support)

Why did you make it?

To remove the need of using lots of cables with a breadboard, which made transport of a "project in development" very fragile

What makes it special?

• Existing adapters, which can be brought for this bluetooth modules from Chinese suppliers have 2 row pins on each side, which make them unusable with a breadboard, this one has only 1row of pins on each side so it can be used with breadboard

useful/support links

• github repository with KiCad schematics symbol, PCB modules(footprints)(+ lot of pdf's in library/Datasheet folder) for both bk8000l and bk3452

• github [repository] (https://github.com/tomaskovacik/hw/tree/master/kicad/F-6888_breakaout_adapter/old/v1) with complete KiCad project of this module

• single voltage differential amplifier for BK8000L module or standard preamp for BK3254, which did not have differential outpu

Tested schematics for SDcard :

Actual adapter schematics:

Assemble plan: