Hi,
I finished making a Bluetooth for my EQ6 last week end, works very nice
Not sure about a logic convertor, all I used with mine was a 7805 (to drop voltage from 12 to 5, and as far as i know the back board where the BT sits on, does the 5 to 3.3 reduction, I had a look at the schematics on the EQMod site, but its all Greek to me.
Loupy