Summary

• 17x 5mm LEDs
• 2x 6mm buttons
• 19x 1k resistors
• arduino nano

int h16 = 2; //hour
int h8 = 3;
int h4 = 4;
int h2 = 5;
int h1 = 6;

int m32 = 7; //minute
int m16 = 8;
int m8 = 13;
int m4 = 10;
int m2 = 11;
int m1 = 12;

int s32 = A0; //second
int s16 = A1;
int s8 = A2;
int s4 = A3;
int s2 = A4;
int s1 = A5;

int bm = A6; //button minute
int bh = A7; //button hour

Download code below