The Arduino board I am using is made by CrossRoads from this forum. It has built in RTC and SDcard slot. A picture of it is on this page Cross Roads Electronics
And yes, I would really like to see the schematics for LM393!!!
I can not figure out how to make a picture of the schematic but, I will send you an Eagle .sch file of level converter. Please double check the design, it is board that I am designing but, it is not finished...........e-mail is sent.
Do not worry to ask for the code, I have already stolen something from the your code (the one you posted) and tested this evening with success
I am glad to hear that the code worked for you.
So you are going to use your project on the motorbike?
I have a 08 Suzuki GSXR and I have been communicating with it using a computer and program written by some other people http://ecuhacking.activeboard.com/. My project replaces the computer with my Arduino to log data and display sensor data. I have a lot of the code working but, there are still bugs that need worked out.
I can tell you many things about the bike programming but, it would have to be another thread.