4 layers110 × 100 mm
Nightwave Reference
Hustlenix/Nightwave
Offline-first, battery-powered ESP32-S3 music player for the Hack Club Pixl Trial
135 partsMIT
2 layers74.8 × 49.8 mm
Using BM83 and MCP2515 to add CAN-bus connected bluetooth audio to BMW E9X series
- Size
- 74.8 × 49.8 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 95
- Nets
- 120
- Pads
- 343
- Tracks, vias
- 628, 125
- Pours
- 12
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 22 Jul 2023
- Updated
- 15 Feb 2024
Overview
BMW BT is an open-source printed circuit board by Christian-Ristevski, from the Christian-Ristevski/E9X-CAN-BT repository on GitHub. It is a 2-layer board of 74.8 × 49.8 mm with 95 parts on 120 nets, routed with 628 tracks and 125 vias.
It is built around the ESP32-C3, BM83SM1-00TA and MP2359DJ-LF-P, with the USBLC6-2SC6, MCP1725-3302E/MC and IRLML6401TRPBF among its other parts. Its parts include 36 capacitors, 16 resistors, 9 ICs, 9 diodes and 7 connectors. It belongs with the ESP32 and RISC-V boards of this library.
Main components
9
ESP32-C3
QFN-32-EP(5x5)12bit 160MHz 22 3V~3.6V Others QFN-32-EP(5x5) Microcontrollers (MCU/MPU/SOC) ROHSEspressif SystemsMicrocontrollers (MCU/MPU/SOC)BM83SM1-00TA
SMD-50PSMD-50P RF Modules ROHSMicrochip TechnologyRF Modules
MP2359DJ-LF-P
TSOT-23-6-40℃~+85℃ 1 1.4MHz 4.5V~24V 810mV~15V Adjustable Buck Buck Built-in No TSOT-23-6 DC-DC Converters ROHSMonolithic Power SystemsDC-DC ConvertersUSBLC6-2SC6
SOT-23-60.35pF、0.8pF 100nA 150W@8/20us 15V 2 5V 6A@8/20us 6V ESD SOT-23-6 ESD and Surge Protection (TVS/ESD) ROHSUMWESD And Surge Protection (TVS/ESD)
MCP1725-3302E/MC
DFN-8-EP(2x3)-40℃~+125℃@(Tj) 1 3.3V 500mA 60dB@(100kHz) 6V Fixed Positive Under Voltage Lockout、Over Current Protection、Over Temperature Protection、Enable、Short Circuit Protection DFN-8-EP(2x3) Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSMicrochip TechnologyVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
IRLML6401TRPBF
SOT-23-55℃~+150℃ 1 P-Channel 1.3W 125pF 12V 15nC@5V 180pF 4.3A 50mΩ@4.5V 830pF 950mV SOT-23 MOSFETs ROHSInfineon TechnologiesMOSFETsSJ2-35863B1-SMT-TR
SMD-25℃~+85℃ 12V 1A 3.5mm Headphone Jack Copper alloy Silver SMD Audio Connectors ROHSCUIAudio Connectors (Headphones)
CDSOD323-T12LC
SOD-323ESD And Surge Protection (TVS/ESD)TECH PUBLIC
RRR040P03TL
SC-96-55℃~+150℃ 1 P-Channel 10.5nC 130pF 150pF 1W 1nF 2.5V 30V 4A 72mΩ@4V P-Channel SC-96 MOSFETs ROHSROHM SemiconductorMOSFETs
README
README.mdE9X-CAN-BT
Problem Description
Many of the E9X series of BMW cars were manufactured without support for bluetooth music playback. To modernize these cars, many vendors have begun selling bluetooth-AUX modules of different kinds. The modules all come with the same problem, they aren't connected to the car's CAN network and therefore cannot utilize the built-in steering wheel radio controls. Forcing a driver to scramble around with their phone while driving is both inconvenient and unsafe and should prove easy to adress by designing a bluetooth module with CAN read functionality.
Roadmap
- Choose ICs (Programmable, CAN, Bluetooth)
- Schematic (Communication)
- Schematic (Power)
- PCB layout and routing
- PCB Manufacturing
- PCB Assembly
- Test power electronics
- Test program upload
- Functional testing (Whole PCB)
- Car installation
- System testing
Requirements
- Bluetooth audio compatible with all smartphones (A2DP)
- Music controls though steering wheel (CAN bus)
- Invisible installation (Behind Radio)
- Runs from automotive 12 V line (Power electronics)
Parts
95| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | 10u | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C1, C3, C4, C7, C9, C17, C23, C25 |
| 4 | 0.1u | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C21, C24, C37, C38 |
| 4 | 5V | Diode_SMD_Custom:D_SOD-882 | D5, D6, D7, D8 |
| 4 | MountingHole | MountingHole:MountingHole_2.2mm_M2 | H1, H2, H3, H4 |
| 3 | 100n | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C18, C19, C22 |
| 3 | 100n | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C28, C29, C34 |
| 3 | LOGO | LOGO | G***, G***, G*** |
| 2 | 0.1uF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C10, C27 |
| 2 | 100k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R1, R6 |
| 2 | 10k 1% | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R9, R10 |
| 2 | 10p | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C32, C33 |
| 2 | 10uF 10V | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C13, C14 |
| 2 | 12p | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C30, C31 |
| 2 | 1k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R11, R12 |
| 2 | 1k 1% | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R7, R8 |
| 2 | 1u | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C26, C36 |
| 2 | 4.7u | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C5, C6 |
| 2 | 470pF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C11, C12 |
| 2 | IRLML6401TRPBF | Package_TO_SOT_SMD:SOT-23 | Q2, Q3 |
| 2 | SJ2-35863B1-SMT-TR | Connector_Audio_Custom:SJ2-35863B1-SMT-TR | J2, J3 |
| 2 | Screw_Terminal_01x02 | TerminalBlock:TerminalBlock_Altech_AK300-2_P5.00mm | J1, J7 |
| 2 | USBLC6-2SC6 | Package_TO_SOT_SMD:SOT-23-6 | U4, U5 |
| 2 | USB_B_Micro | Connector_USB:USB_Micro-B_Molex-105017-0001 | J4, J5 |
| 1 | 100 @ 100M | Inductor_SMD:L_0805_2012Metric_Pad1.05x1.20mm_HandSolder | FB2 |
| 1 | 100k | Resistor_SMD:R_0805_2012Metric | R16 |
| 1 | 10k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R5 |
| 1 | 10n | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C2 |
| 1 | 10n | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C35 |
| 1 | 10u | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C20 |
| 1 | 14u | Inductor_SMD:L_0603_1608Metric_Pad1.05x0.95mm_HandSolder | L1 |
| 1 | 16MHz | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | X1 |
| 1 | 1n | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C8 |
| 1 | 22R | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R14 |
| 1 | 22R | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R13 |
| 1 | 2nH | Inductor_SMD:L_0402_1005Metric_Pad0.77x0.64mm_HandSolder | L3 |
| 1 | 40MHz | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | X2 |
| 1 | 47k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R3 |
| 1 | 500mA | Fuse:Fuse_1812_4532Metric_Pad1.30x3.40mm_HandSolder | F1 |
| 1 | 5k1 | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R15 |
| 1 | 600 @ 600MHz | Inductor_SMD:L_0805_2012Metric_Pad1.05x1.20mm_HandSolder | FB1 |
| 1 | 68k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R2 |
| 1 | 8k45 | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R4 |
| 1 | B230A-13-F | Diode_SMD:D_SMA | D1 |
| 1 | BLUE | LED_SMD:LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D11 |
| 1 | BM83SM1-00TA | Custom:BM83_MCH | U6 |
| 1 | Blue | LED_SMD:LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D9 |
| 1 | CDSOD323-T12LC | Diode_SMD:D_SOD-323_HandSoldering | D4 |
| 1 | Conn_01x02_Pin | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J6 |
| 1 | ESP32-C3 | Custom:QFN50P500X500X90-33N-D | IC1 |
| 1 | GREEN | Diode_SMD:D_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D10 |
| 1 | MCP1725-3302E/MC | Custom:DFN8_2x3MC_MCH | U3 |
| 1 | MCP1825S | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U2 |
| 1 | MCP2515-xSO | Package_SO:SOIC-18W_7.5x11.6mm_P1.27mm | U7 |
| 1 | MCP2562-H-SN | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U8 |
| 1 | MP2359DJ-LF-P | Package_TO_SOT_SMD:TSOT-23-6_HandSoldering | U1 |
| 1 | RRR040P03TL | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | SW_Push | Button_Switch_SMD:SW_SPST_B3U-1000P | SW1 |
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Questions
How big is the BMW BT PCB?
It measures 74.8 × 49.8 mm and has 2 copper layers, 1.6 mm thick.
What parts does the BMW BT use?
95 parts, built around the ESP32-C3, BM83SM1-00TA, MP2359DJ-LF-P and USBLC6-2SC6. 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 BMW BT KiCad files?
From the Christian-Ristevski/E9X-CAN-BT repository on GitHub, at the commit this page was made from: the board is ECAD/BMW_BT.kicad_pcb and its schematic ECAD/BMW_BT.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the BMW BT design in my own project?
Its repository states no licence, so its author keeps all rights: ask Christian-Ristevski before reusing the design.