On-board Diagnostic Between Mitsubishi ECU Using Arduino - Part 2

Hardware
The following lists are the items required for this project:

• Arduino
So what is Arduino? "Arduino is an open-source electronics prototyping platform based on flexible, easy-to-use hardware and software. It's intended for artists, designers, hobbyists, and anyone interested in creating interactive objects or environments." You can get more detail information about Arduino at here. There are various types of Arduino at market. For the development of this project I use Arduino UNO R3 and other type of Arduino clone still can be use. If you on budget you can build Arduino standalone by your self. Here some of the tutorial how to make it:

# http://www.instructables.com/id/Standalone-Arduino-ATMega-chip-on-breadboard/

# http://hcgilje.wordpress.com/resources/arduino-standalone/ 

# Google Search

• ALDL to RS232 adapter
I'm using this schematic diagram to made the adapter. Please use this diagram for our tutorial process.

Please take a note that there is some modification I've made by adding a 1 hex inverter 7404 ic in process of building the pcb. The purpose of 7404 IC is to intervention the Arduino serial signal instead using using another RS232 to TTL adapter. By the way this board is under development because there is some error found which made my the LCD shown unknown character. 

The prototype of 2 layer PCB version - Mitsuduino Shield using 7404IC and MAX232

• dfRobot rs232 to ttl converter
It used to convert the serial signal to our ALDL adapter. You can also use other type of adapter as long it can convert the signal between rs232(serial) to ttl 5v signal.

 

• 16x2 Character LCD
It used to display the value we get from the ECU. You can get the cheapest on the ebay "keyword 16x2 lcd"

Okey we have finished on preparation the hardware side but not done on wiring/cabling :P, i will write about it for next article  and also on the software part including the simple coding for Arduino to display the result we got into LCD Display.