I'd suggest darlingtons array, ULN2003A or may be ULN2001A with base R barely enough to trigger with higher voltage and not with lower. Other option is optocoupler, with couple resistors in front as voltage divider.
I'd suggest darlingtons array, ULN2003A or may be ULN2001A with base R barely enough to trigger with higher voltage and not with lower. Other option is optocoupler, with couple resistors in front as voltage divider.