2 layers208.8 × 396.9 mm
Ferris
pierrechevalier83/ferris
A low profile split keyboard designed to satisfy one single use case elegantly
145 parts1.3k
2 layers41.5 × 33.4 mm
BT Qualcomm
tauhidansari07/Audio-Interface-PCBA custom printed circuit board designed to integrate a Bluetooth converting into 3.5mm jack for devices that doesnt have one and you wanna connect your fav wired earphones or headsets
- Size
- 41.5 × 33.4 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 25
- Nets
- 61
- Pads
- 123
- Tracks, vias
- 97, 20
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 17 May 2026
- Updated
- 17 May 2026
Overview
BT Qualcomm is an open-source printed circuit board by tauhidansari07, from the tauhidansari07/Audio-Interface-PCB repository on GitHub. It is a 2-layer board of 41.5 × 33.4 mm with 25 parts on 61 nets, routed with 97 tracks and 20 vias.
It is built around the AP2112K-3.3 and PJ-320A. Its parts include 9 resistors, 4 capacitors, 3 ICs, 3 connectors and 2 diodes.
Main components
2README
README.mdCustom Bluetooth Audio Interface PCB
A custom printed circuit board designed to integrate a Bluetooth converting into 3.5mm jack for devices that doesnt have one and you wanna connect your fav wired earphones or headsets
Technical Details
- Core IC: FM9688 (Power Management / Buck Converter), FSC-BT1026E (blutooth receiver)
- Design Software: KiCad
- Key Features: To Get Audio Output For 3.5mm Jack Through Blutooth Low Letency For Gaming Purpose or General Purpose
Included Files
- KiCad source files (Schematic & PCB layout)
- PDF Schematic for quick viewing
- Ready-to-manufacture Gerber files
Parts
25| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 47uF | Resistor_SMD:R_0805_2012Metric | R6, R7, R8, R9 |
| 2 | 4.7uF | Capacitor_SMD:C_0201_0603Metric | C1, C2 |
| 2 | 5.1K | Resistor_SMD:R_0402_1005Metric | R4, R5 |
| 2 | LED | LED_SMD:LED_0402_1005Metric | D1, D2 |
| 1 | 10K | Resistor_SMD:R_0402_1005Metric | R1 |
| 1 | 1k | Resistor_SMD:R_0402_1005Metric | R2 |
| 1 | 1uF | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C3 |
| 1 | 1uF | Capacitor_SMD:C_0402_1005Metric | C4 |
| 1 | 330Ω | Resistor_SMD:R_0402_1005Metric | R3 |
| 1 | AP2112K-3.3 | Package_TO_SOT_SMD:SOT-23-5 | U2 |
| 1 | Battery CON | Connector_Hirose:Hirose_DF3EA-02P-2V_1x02-1MP_P2.00mm_Vertical | J2 |
| 1 | FSC-BT1026E | FTP for QC BT ic:FSCBT1026E | IC1 |
| 1 | GND | TestPoint:TestPoint_Pad_D1.5mm | GND |
| 1 | MCP73831-2-OT | Package_TO_SOT_SMD:SOT-23-5 | U1 |
| 1 | PJ-320A | FTM audio Jack:PJ320A | J3 |
| 1 | RX | TestPoint:TestPoint_Pad_D1.5mm | RX |
| 1 | SW_Push | Button_Switch_SMD:SW_Push_1P1T_NO_CK_KSC6xxG | SW1 |
| 1 | TX | TestPoint:TestPoint_Pad_D1.5mm | TX |
| 1 | USB_C_Receptacle_PowerOnly_6P | Connector_USB:USB_C_Receptacle_GCT_USB4125-xx-x-0190_6P_TopMnt_Horizontal | J1 |
Questions
How big is the BT Qualcomm PCB?
It measures 41.5 × 33.4 mm and has 2 copper layers, 1.6 mm thick.
What parts does the BT Qualcomm use?
25 parts, built around the AP2112K-3.3 and PJ-320A. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the BT Qualcomm KiCad files?
From the tauhidansari07/Audio-Interface-PCB repository on GitHub, at the commit this page was made from: the board is BT Qualcomm.kicad_pcb and its schematic BT Qualcomm.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the BT Qualcomm design in my own project?
Its repository states no licence, so its author keeps all rights: ask tauhidansari07 before reusing the design.
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