User manual

www.sainsmart.com

LEDs

Red LED positive connected to Arduino Uno Analog A0

Green LED positive connected to Arduino Uno Analog A1

Ground legs connected to Arduino Ground

Relays

VCC connected to Arduino 5v

IN1 connected to Arduino D2

IN2 connected to Arduino D3

IN3 connected to Arduino D4

IN4 connected to Arduino D5

Ground connected to Arduino Ground

Keypad

Connected to Arduino D6-D13

Power

9V battery connected to Arduino Ground and VIN when not connected to computer USB

Example code

/* Locked Relays

* An SainSmart Uno, Keypad, Relays and some LEDs for fun

* Using a password to enable the relays, then selective

* toggle the relays by key.

* Needed libraries

* http://arduino.cc/playground/uploads/Code/Keypad.zip

* http://arduino.cc/playground/uploads/Code/Password.zip

#include <Keypad.h>/*

#include <Password.h>/*

int relay1 = 2;

int relay2 = 3;

int relay3 = 4;

int relay4 = 5;

int locked = 1;

int passinput = 0;

int lockedled = 14;

int unlockedled = 15;

long ledflashvar = 0;

long ledflashtime = 300;