SevenSegHW.cpp (in Designlab version 1.0.1 at least ) has to be corrected as : static unsigned char table7seg[16] = { 0x3F, //0011 1111, 0 0x06, //0000 0110, 1 0x5B, //0101 1011 2 0x4F, //0100 1111 3 0x66, //0110 0110 4 0x6D, //0110 1101 5 0x7D, //0111 1101 6 0x07, //0000 0111 7 0x7F, //0111 1111 8 0x6F, //0110 1111 9 0x77, //0111 0111 A 0x7C, //0110 1110 B 0x39, //0011 1001 C 0x5E, //0101 1110 D <============== !!! 0x79, //0111 1001 E 0x71 //0111 0001 F }; Regards