I attached a rs232 device on RX and TX pins of my board but I need a TTL converter because the output of the rs232 is not TTL compatible, so I bought this onehttp://www.cooking-hacks.com/index.php/rs232-shifter-smd.html
and I figured out I need 2.8V as Vcc, so I built a voltage divider to get 2.8v as Vout.
I attached to Vcc but I can not read the serail data vie the converter. If I wire directly the rs232 device into the board it works fine but the data read is not correct.
Before to build the voltage driver I powered the converter with 5V, is it possibile that I burned out it?
Otherwise how can i debug it?