image/svg+xml Left edge Left edge Bottom edge Bottom edge Top edge Top edge Right edge Right edge = track separated beneath = track separated beneath = component inserted into this hole = component inserted into this hole = link/jumper = link/jumper = connector = connector A A B B C C D D E E F F G G H H I I J J K K L L 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 15 15 16 16 17 17 18 18 19 19 20 20 21 21 22 22 23 23 24 24 25 25 26 26 27 27 M M N N O O A B B C C D A P B Q C R D S E T F U G V H W I X J Y K Z L A U1: PIC16F628 U1: PIC16F628 J1 J1 J2 J2 J6 J6 J3 J3 J4 J4 J5 J5 R2 R2 R3 R3 U2: ULN2803 U2: UDN2559 R1 R1 R4 R5 R4 R4