I know that many multi row LCD displays use the HD 4780 controller and that there several interface boards available convert RS232 to HD4780 but... What about simple single row displays? Is there a "standard" way to drive a single row of eight 7 segment digits from a serial port? (Eg for outdoor signs).
I could easily design my own interface but would like the option of being able to buy a bigger commercial unit later if such a standard exists.