Hi Steave and Melanie.

Thanyou foe the feedback.Just let you know that i will be starting of the project next week and i have just purchase the MEL LAB "X1" board.
Just wondering if you guys have any schematic drawings of the opamp where we can scale down the voltages from 10 - 18 volts dc to 0 to 5 volts dc.

i have printed out all the foulars anf also the comments given in this forum and i remember clearly reading and artical by Melanie and also Steave.

If you could help me get the schematic diagram or even an url that will show how to scale down the voltages this will be much help.

Currently i have manage to read temperatues from the "X1" for and this will help me get the project running as i will be using it to measure cabin and outside temperature of the car.

As for the obd codes there isn't any site that will show the conversion of the obd codes so this will be a problem as i am very new in the PIC system and also programming.

Thanks for the advice and hope to hear from you on the schematic diagrams.

thank you & God Bless