Instructions

IDUINO for maker’s life
10 www.openplatform.cc
Module 2: Relay Module
1. Introduction
The module is uses SRD relay module to control high-voltage electrical device. It can be
used in interactive projects and can also be used to control the lighting, electrical and other
equipment. It can be controlled directly by a wide range of microcontrollers and can be
controlled through the digital IO port, such as solenoid valves, lamps, motors and other high
current or high voltage devices.
Remarks: This is declare that the relay module is only for low voltage (below 75 V/DC and
50 V/AC).
specifications:
 Number of I/O Channels: 1
 Input Voltage: 5V DC
 Type: Digital
 Control signal: TTL level
 Max allowable output Voltage: 50V AC/75V DC
 Indication LED for Relay's Status
2. Pinout
Pin Name
Description
“+”
Power(5V DC)
“-”
GND
“S”
Signal pin, connected with Arduino
“NO”
Normally open terminal
“NC”
Normally closed terminal
“C”(middle pin)
Common terminal, Which connected with the power for the load.