As seen in Circuit Cellar. :)

http://www.scantool.net/parts/microobd-200.html

Description

microOBD 200 is a quick and easy way to add OBD support to any embedded 
project. It is a complete OBD-II to UART interface in a DIP-24 form factor, 
designed for in-vehicle applications. microOBD 200 uses an enhanced version 
of the popular ELM327 command set, supports UART speeds up to 10 Mbps and is 
firmware upgradeable.

Key Features
   * Supports all legislated OBD-II protocols and J1939 (heavily duty 
vehicles)
   * Fully compatible with the ELM327 command set
   * Extended "ST" command set for access to advanced functionality not 
available in the ELM327
   * UART interface
   * Bootloader for easy firmware upgrades
   * Large memory buffer
   * Solid automatic protocol detection algorithm, connects to more vehicles 
reliably
   * Smart keep-alive algorithm helps ensure a stable connection on ISO and 
KWP vehicles
   * Dimensions: 1.3" x 0.59"

Supported OBD Protocols
   * SAE J1850 PWM
   * SAE J1850 VPW
   * SAE J1939
   * ISO 9141-2
   * ISO 14230-4 (KWP 2000)
   * ISO 15765-4 (CAN)
   * ISO 11898 (raw CAN)

User guide and example schematics will be available soon.


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