pulse# weight weight weight weight
(binary)  8      4      2     1
0000     off    off    off    off
0001     off    off    off    on
0010     off    off    on     off
0011     off    off    on     off
0100     off    on     off    off
0101     off    on     off    off
0110     off    on     off    off
0111     off    on     off    off
1000     on     off    off    off
1001     on     off    off    off
1010     on     off    off    off
1011     on     off    off    off
1100     on     off    off    off
1101     on     off    off    off
1110     on     off    off    off
1111     on     off    off    off