2 layers40.5 × 74.3 mm
EMO current sense INA190
darshanram008/EMO_OBD_tool
On board diagnostic tool for Battery management system
113 parts1
2 layers35.1 × 62.7 mm
EMO SN65 OBD
darshanram008/EMO_OBD_tool1On board diagnostic tool for Battery management system
- Size
- 35.1 × 62.7 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 116
- Nets
- 85
- Pads
- 283
- Tracks, vias
- 433, 85
- Pours
- 154
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 7 Aug 2023
- Updated
- 11 Jan 2026
Overview
EMO SN65 OBD is an open-source printed circuit board by darshanram008, from the darshanram008/EMO_OBD_tool repository on GitHub. It is a 2-layer board of 35.1 × 62.7 mm with 116 parts on 85 nets, routed with 433 tracks and 85 vias.
It is built around the PIC18F27Q84-E/SO, CP2102-GMR and MCP2551-I/SN, with the AT24C256C-SSHL-T, RT0603WRE071KL and RT0402BRE071KL among its other parts. Its parts include 42 resistors, 14 capacitors, 4 ICs, 4 diodes and 4 connectors. It belongs with the PIC boards of this library.
Main components
12
PIC18F27Q84-E/SO
SOIC-28-300mil-40℃~+125℃ 1.8V~5.5V 128KB 12bit 1KB 25 64MHz 8 Bit 8KB 8bit Built-in FLASH PIC SOIC-28-300mil Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
CP2102-GMR
WQFN-28-EP(5x5)-40℃~+85℃ 1Mbps 20mA 3V~3.6V 80uA Transceiver USB 2.0 WQFN-28-EP(5x5) USB Converters ROHSSilicon LabsUSB Converters
MCP2551-I/SN
SOIC-8-40℃~+85℃ 1Mbps 365uA 4.5V~5.5V 75mA CAN Transceiver SOIC-8 CAN Transceivers ROHSMicrochip TechnologyCAN TransceiversAT24C256C-SSHL-T
SOIC-8-40℃~+85℃ 1,000,000 cycles 1.7V~5.5V 1MHz 256Kbit 40 Years 5ms Hardware write protection function、Noise suppression function I2C SOIC-8 EEPROM ROHSMicrochip TechnologyEEPROM
RT0603WRE071KL
0603-55℃~+155℃ 100mW 1kΩ 75V Thin Film Resistor ±0.05% ±50ppm/℃ 0603 Chip Resistor - Surface Mount ROHSYAGEOChip Resistor - Surface Mount
RT0402BRE071KL
0402-55℃~+155℃ 1kΩ 50V 62.5mW Thin Film Resistor ±0.1% ±50ppm/℃ 0402 Chip Resistor - Surface Mount ROHSYAGEOChip Resistor - Surface Mount
RC0402FR-0710KL
UncategorisedUnknown maker
CC0402KRX7R7BB104
0402100nF 16V X7R ±10% 0402 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSYAGEOMultilayer Ceramic Capacitors MLCC - SMD/SMT
RC0603FR-0710RL
UncategorisedUnknown makerCC0402KRX7R7BB101
0402100pF 16V X7R ±10% 0402 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSYAGEOMultilayer Ceramic Capacitors MLCC - SMD/SMT
ABM7-10.000MHZ-D2Y-T
SMD6035-2PCrystalsAbracon
SM03B-GHS-TB
UncategorisedJST
README
README.mdOn board diagnostic tool: developed for EMO energy pvt ltd.
On Board diagnostic tool is a simple PCB that can be interfaced with the internal battery management system that cannot be accessed during the maintence or diagnostics of the battery pack
The priamry functionn of the OBD tool:
- Communicate via controller area network (CAN) protocol to the battery and request the BMS to send necessary data.
- Communicate via the Universal serial asynchronous RX-TX protocol to the GUI and deliver the data in human readable from.
The following operations are implemenetd
- Request real time data containing cell voltages, pack voltage, pack current, temperatures, error and faults from the BMS and transmit to the USB via UART in the form of strings appended with certain identifiers.
- Request the configuration parameters from the BMS that was already uploaded upon getting a command request from the GUI
- Push the new configuration parameters to the BMS on command request from the GUI.
- Request SD card data to be downloaded on request from the GUI.
- Change baud rates of UART and CAN upon command request from GUI
- Flow control between OBD and BMS whenever there is an event of exchanging data.
- Microcontroller unit: Microchip PIC18F27Q84
- CAN transciever: Microchip MCP2551; variable Baud rate upto 1Mbps
- UART to USB converter: Silicon labs CP2102; variable baud rate uptp 115200
- Micrchip MPLAB X IDE
Parts
116| Qty | Value | Footprint | References |
|---|---|---|---|
| 9 | 0R | Resistor_SMD:R_0603_1608Metric | R1, R2, R3, R5, R7, R20, R25, R26, R35 |
| 8 | 1k | Resistor_SMD:R_0603_1608Metric | R29, R30, R31, R32, R33, R34, R36, R37 |
| 7 | 1k | Resistor_SMD:R_0402_1005Metric | R6, R8, R12, R17, R22, R23, R24 |
| 6 | MountingHole | MountingHole:MountingHole_2.2mm_M2 | H1, H2, H3, H4, H5, H6 |
| 5 | 4.7uF/25V | Capacitor_SMD:C_0402_1005Metric | C1, C2, C3, C9, C12 |
| 4 | 10K | Resistor_SMD:R_0402_1005Metric | R21, R38, R39, R40 |
| 3 | 0.1uF/25V | Capacitor_SMD:C_0402_1005Metric | C8, C10, C11 |
| 3 | 330R | Resistor_SMD:R_0402_1005Metric | R9, R41, R42 |
| 2 | 10R | Resistor_SMD:R_0603_1608Metric | R27, R28 |
| 2 | 33p/25V | Capacitor_SMD:C_0402_1005Metric | C6, C7 |
| 2 | 5.1k | Resistor_SMD:R_0402_1005Metric | R13, R14 |
| 2 | GND | Custommm:testpoint_0.5mm | TP20, TP33 |
| 2 | LED | LED_THT:LED_D3.0mm_IRBlack | D2, D4 |
| 1 | 0.001uF/25V | Capacitor_SMD:C_0402_1005Metric | C13 |
| 1 | 0.01uF/25V | Capacitor_SMD:C_0402_1005Metric | C14 |
| 1 | 0.1n/25V | Capacitor_SMD:C_0402_1005Metric | C5 |
| 1 | 0R | Resistor_SMD:R_0805_2012Metric | R15 |
| 1 | 10MHz | Custommm:ABLS8000MHZB4T | Y2 |
| 1 | 10k | Resistor_SMD:R_0402_1005Metric | R10 |
| 1 | 120R | Resistor_SMD:R_0402_1005Metric | R4 |
| 1 | 1uF/25V | Capacitor_SMD:C_0402_1005Metric | C4 |
| 1 | 22.1k | Resistor_SMD:R_0402_1005Metric | R18 |
| 1 | 47.5k | Resistor_SMD:R_0402_1005Metric | R19 |
| 1 | 470R | Resistor_SMD:R_0402_1005Metric | R11 |
| 1 | 5A fuse | Custommm:FUSE | R16 |
| 1 | 5V | Custommm:testpoint_0.5mm | TP11 |
| 1 | 5V_MCP | Custommm:testpoint_0.5mm | TP29 |
| 1 | 5V_PIC | Custommm:testpoint_0.5mm | TP25 |
| 1 | AT24C256C-SSHL-T | Custommm:AT24C256_SOIC127P600X175-8N | U4 |
| 1 | CAN | Connector_JST:JST_GH_SM03B-GHS-TB_1x03-1MP_P1.25mm_Horizontal | J6 |
| 1 | CAN_RX | Custommm:testpoint_0.5mm | TP24 |
| 1 | CAN_TX | Custommm:testpoint_0.5mm | TP23 |
| 1 | CH | Custommm:testpoint_0.5mm | TP21 |
| 1 | CL | Custommm:testpoint_0.5mm | TP22 |
| 1 | CP2102-GMR | Custommm:QFN50P500X500X100-29N-D | U3 |
| 1 | D+ | Custommm:testpoint_0.5mm | TP32 |
| 1 | D- | Custommm:testpoint_0.5mm | TP7 |
| 1 | I2C | Connector_PinHeader_1.27mm:PinHeader_1x04_P1.27mm_Vertical | J2 |
| 1 | ICSDAT | Custommm:testpoint_0.5mm | TP16 |
| 1 | ICSPLK | Custommm:testpoint_0.5mm | TP15 |
| 1 | Jumper_2_Open | Jumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP1 |
| 1 | LED | LED_SMD:LED_0603_1608Metric | D3 |
| 1 | LOGO | emo logo | G*** |
| 1 | MCP2551-I-P | mcp2551:SOIC127P600X175-8N | U2 |
| 1 | PIC18F27Q84 | Custommm:PIC18F27Q84_SOIC127P1030X265-28N | U1 |
| 1 | RA0 | Custommm:testpoint_0.5mm | TP1 |
| 1 | RA1 | Custommm:testpoint_0.5mm | TP2 |
| 1 | RA2 | Custommm:testpoint_0.5mm | TP3 |
| 1 | RA3 | Custommm:testpoint_0.5mm | TP4 |
| 1 | RA4 | Custommm:testpoint_0.5mm | TP5 |
| 1 | RA5 | Custommm:testpoint_0.5mm | TP6 |
| 1 | RB4 | Custommm:testpoint_0.5mm | TP12 |
| 1 | RB5 | Custommm:testpoint_0.5mm | TP10 |
| 1 | RC1 | Custommm:testpoint_0.5mm | TP8 |
| 1 | RC2 | Custommm:testpoint_0.5mm | TP9 |
| 1 | RCO | Custommm:testpoint_0.5mm | TP31 |
| 1 | RX | Custommm:testpoint_0.5mm | TP39 |
| 1 | SBU1 | Custommm:testpoint_0.5mm | TP19 |
| 1 | SBU2 | Custommm:testpoint_0.5mm | SBU2 |
| 1 | SCL | Custommm:testpoint_0.5mm | TP18 |
| 1 | SDA | Custommm:testpoint_0.5mm | TP17 |
| 1 | SP0505BAHT | Custommm:SP0505BAHT_SOT95P280X145-6N.kicad_mod | D1 |
| 1 | TX | Custommm:testpoint_0.5mm | TP38 |
| 1 | USB C 2.0 | Connector_USB:USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J4 |
| 1 | Vref | Custommm:testpoint_0.5mm | TP30 |
| 1 | cin | Custommm:testpoint_0.5mm | TP27 |
| 1 | cout | Custommm:testpoint_0.5mm | TP26 |
| 1 | samtec_03x02 | Custommm:SAMTEC_1.27mm_03x02 | J1 |
The 110 most common of 116 parts.
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Questions
How big is the EMO SN65 OBD PCB?
It measures 35.1 × 62.7 mm and has 2 copper layers, 1.6 mm thick.
What parts does the EMO SN65 OBD use?
116 parts, built around the PIC18F27Q84-E/SO, CP2102-GMR, MCP2551-I/SN and AT24C256C-SSHL-T. 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 EMO SN65 OBD KiCad files?
From the darshanram008/EMO_OBD_tool repository on GitHub, at the commit this page was made from: the board is E008-OBD TOOL R0.1/Design/EMO SN65 OBD.kicad_pcb and its schematic E008-OBD TOOL R0.1/Design/EMO SN65 OBD.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the EMO SN65 OBD design in my own project?
Its repository states no licence, so its author keeps all rights: ask darshanram008 before reusing the design.