// Goes with it

Complete the build

The parts this one is wired with in our kits — have them on the bench before you start.

DIY-003

0.96" OLED Display Module 128x64 I2C (White)

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DIY-337

L9110 DC Motor Driver Board - Dual Channel H-Bridge, 2.5V-12V, 800mA per Channel, for Arduino Robotics & DIY DC Motors

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DIY-006

9V Battery Snap to DC Male Power Adapter, Compatible with Arduino Uno R3

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SG90

SG90 9g Micro Servo Motor, 180° Position Control PWM RC Servo, 4.8V–6V Mini Servomotor for Arduino ESP32 RC Models, Robot Arm, Steering, Pan/Tilt, Includes Servo Horns + Screws

6 in stock

// 01

Description

The 5V 1-Channel Relay Module is a reliable switching board that lets microcontrollers safely control higher-voltage or higher-current devices such as lamps, fans, solenoids, pumps, and other appliances. It uses a 5V coil relay rated up to 10A (typical resistive rating) and features optocoupler isolation to help reduce electrical noise and improve protection between your control side and the load side.

This module is designed for easy integration with popular development boards including Arduino, AVR, PIC, ARM, and DSP MCUs. With a low-level trigger input, the relay turns ON when the input pin is driven LOW, which is convenient for many microcontroller setups.

Key Features & Benefits

Low-Voltage Control of High-Power Loads: Control AC or DC loads using a simple GPIO signal
Low-Level Trigger: Relay activates when IN = LOW (logic low)
Optocoupler Isolation: Improves safety/noise immunity and reduces interference to MCU
High Switching Capability: 10A relay for common home/DIY loads (use within rating)
Indicator LED: Visual status for power and relay activation (typical)
Screw Terminals: Secure COM/NO/NC connections for quick wiring

Pinout / Connections (Typical)

Control Side (3-pin header):

Pin	Function
VCC	5V supply
GND	Ground
IN	Trigger input (LOW = ON)

Load Side (Screw terminals):

Terminal	Meaning
COM	Common
NO	Normally Open (connects to COM when relay ON)
NC	Normally Closed (connects to COM when relay OFF)

Typical Specifications

Item	Details
Module Type	1-channel relay module
Coil Voltage	5V DC
Trigger Type	Low-level trigger
Isolation	Optocoupler
Relay Rating (Typical)	10A @ 250VAC / 10A @ 30VDC (resistive)
Use With	Arduino, AVR, PIC, ARM, DSP, MCU boards

Safety note: Mains AC wiring can be dangerous. Use proper insulation, enclosures, and wiring practices, and never exceed relay/load ratings.

Common Applications

Home automation (lights, sockets, fans)
Arduino controlled pumps/solenoids
Switching DC loads with external power supplies
Timers, smart switches, IoT relay control projects
Isolation switching for noisy loads

// 02

Specifications

Channels 1

Coil Voltage 5 V

Trigger Low-level

Contact Rating 10A 250VAC / 10A 30VDC (typ)

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