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Standard
1.Easy to use and quick to get started
2.The process supports design scales of 300 devices or 1000 pads
3.Supports simple circuit simulation
4.For students, teachers, creators
Profession
1.Brand new interactions and interfaces
2.Smooth support for design sizes of over 5,000 devices or 10,000 pads
3.More rigorous design constraints, more standardized processes
4.For enterprises, more professional users
Ongoing
STD ELM-327
ELM-327
License
GPL 3.0
License: GPL 3.0Mode:
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Update time：
2024-09-29 17:28:05
Creation time：
2024-02-07 00:16:26
Description
Description
If you are working with cars and trying to diagnose it, at some point you will need to interface onboard computer into computer.
Here we offer an OBD-II to serial emulator. It provides simple serial TTL level voltages that you will need to connect to some sort of converter to interface it into RS232, USB or Bluetooth
PCB layout with DB9 will require cable with DB9 to vehicle's OBD-II J1962 connector. or alternative layout with male OBD connector.
For more information, refer to: http://PCBhut.com/Products/ELM327/index.html
Design Drawing
Design Drawing
schematic diagram
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PCB
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| ID | Name | Designator | Footprint | Quantity | |
|---|---|---|---|---|---|
| 1 | SOIC8 | U2B | SOIC8 | 1 | |
| 2 | 100nF | C7,C6,C1,C3,C5,C8,C9,C10 | CERAMIC-5.08 | 8 | C1821 |
| 3 | 2.2uF | C2,C4 | CAP-TH_BD5.0-P2.00-D0.8-FD | 2 | C78759 |
| 4 | Serial | CN1 | HDR-1X4 / 2.54 | 1 | C492605 |
| 5 | DB9F | OBD | DB9-TH_DB9F_C9900018961 | 1 | C9900018961 |
| 6 | term | J1 | HDR-TH_2P-P2.54-V-M-1 | 1 | NONE |
| 7 | LED_5MM | LED1,LED2,LED3 | LED-5MM-5MM | 3 | |
| 8 | BC547B A1G | Q1,Q3,Q5,Q6,Q7 | TO-92-3_L4.8-W3.7-P2.54-L | 5 | C486021 |
| 9 | BC557B | Q2,Q4 | TO-92-3_L4.8-W3.7-P2.54-L | 2 | C2093 |
| 10 | 47k | R1,R9 | RESISTOR D2.5-L7-0.25W | 2 | |
| 11 | 6k2 | R2,R3 | RESISTOR D2.5-L7-0.25W | 2 | |
| 12 | 330R | R4,R5,R6 | RESISTOR D2.5-L7-0.25W | 3 | |
| 13 | 2K2 | R7,R11 | RESISTOR D2.5-L7-0.25W | 2 | |
| 14 | 510R | R8,R12 | RESISTOR D2.5-L7-0.25W | 2 | |
| 15 | 18K | R10 | RESISTOR D2.5-L7-0.25W | 1 | |
| 16 | 4k7 | R13,R15,R16,R21,R23 | RESISTOR D2.5-L7-0.25W | 5 | |
| 17 | 10k | R14,R17,R18,R19,R20,R22 | RESISTOR D2.5-L7-0.25W | 6 | |
| 18 | 120R | R24 | RESISTOR D2.5-L7-0.25W | 1 | |
| 19 | PIC18F25K80-ESP | U1 | DIP28 | 1 | |
| 20 | MCP2562-E/P | U2 | PDIP-8_L9.3-W6.4-P2.54-LS7.6-BL | 1 | C640345 |
| 21 | HDR1X4 | ICSP | HDR-1X6 / 2.54 | 1 | C9900027556 |
| 22 | 4mhz | X1 | HC49U-V | 1 | |
| 23 | KA78L05AAZTA | VR1,VR3 | TO-92-3_L4.8-W3.7-P2.54-L | 2 | C3746588 |
| 24 | AP7384-28V-A | VR2 | TO-92-3_L4.8-W3.7-P2.54-L | 1 | C3752375 |
| 25 | DO-1N4148 | D1,D2,D3 | DO-1N4148 | 3 |
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