M image/svg+xml Left edge Left edge Bottom edge Bottom edge Top edge Top edge Right edge Right edge 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 10 10 11 11 12 12 13 13 14 14 A A B B C C D D E E F F G G H H I I J J K K L L M M N N O O M N N O O A P B Q = track separated beneath = track separated beneath = component inserted into this hole = component inserted into this hole = link/jumper = link/jumper = connector = connector U2: ULN2803 U2: 754410 J2 C1 J2 C2