Quote Originally Posted by tucson kid View Post
I have tried a couple of times to put one together, but have not got them to work with my 747 ecm. Not sure what issues is, there is two different circuits that have seen. What ecm do you have that worked with maxx232 chip, did you buy it already put together? I really thank you for replying
I've used that max232 ttl board with both 160 (various fiero ecms) and 8192 baud (7730) ecms. Also used it with tuner pro and aldldroid.
The chip comes mounted in a breakout board and all you have to do it push the supplied breakout wires onto the correct pins and away you go.
My two transistor board that i ruined started out as a one transistor for 160baud, then i did an ecm swap and built a two transistor for 8192, but i never could get it to connect. I gave up and bought the chip and never looked back.