Relays

Relay modules
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Eight channel 5V DC Relay Module (2A3 8 channel relay)

Description:

This is an eight channel 5V DC relay module with active low. It can be controlled by variety of microcontrollers such as Arduino, Raspberry Pi, PIC, DSP, AVR or ARM etc.

  • Has the ability to control eight separate appliances or pieces of equipment
  • Eight on-board optoisolators enable direct interfacing to microcontrollers
  • Eight red LED status lights on-board show relay activity
  • Widely used in PLC control or smart home control
  • 4 x M3 mounting holes for easy fixing via standoffs

Specifications:

  • 15-20mA drive current needed per channel
  • Relay coil maximum operating voltage: 5V
  • Relay coil maximum current: 89.3mA
  • Relay contact maximum: AC250V at 10A or DC30V at 10A
  • No. of relays/channels: 8
  • Item size: 134 x 55 x 20mm
  • Item weight: 116g

Contents:

  • 1 x 8 Channel Relay Module

Resources:

 

Warning
Exercise proper caution when connecting mains driven equipment or appliances to relay module as lethal current will be present.

R99.90  Inc VAT
Four channel 5V DC Relay Module (2A3 4 channel relay)

Description:

Use this relay board with your Arduino, Raspberry Pi or your custom micro-controller projects!

Specifications:

  • Each Relay has LED indication when ON
  • SPDT Relays with terminal block outputs.
  • Relay Coil voltage: 5 VDC
  • Power Requirement: 5 VDC

Contents:

  • 1 x Four channel 5V DC Relay Module

Resources:


R59.90  Inc VAT
Two Channel 5V DC Relay Module (2A3 2Two channel relay)

Description:

This is a two channel 5V DC relay module with active low. It can be controlled by variety of microcontrollers such as Arduino, Raspberry Pi, PIC, DSP, AVR or ARM etc.

  • Has the ability to control two separate appliances or pieces of equipment
  • Two on-board optoisolators enable direct interfacing to microcontrollers.
  • Two red LED status lights on-board show relay activity.
  • Widely used in PLC control or smart home control
  • 4 x M3 mounting holes for easy fixing via standoffs

Specifications:

  • 15-20mA drive current needed per channel
  • Relay coil maximum operating voltage: 5V
  • Relay coil maximum current: 89.3mA
  • Relay contact maximum:  AC250V at 10A or DC30V at 10A
  • No. of relays/channels: 2
  • Item size: 57 x 55 x 20mm
  • Item weight: 57g

Contents:

  • 1 x 2 Channel Relay Module

Resources:

 

Warning
Exercise proper caution when connecting mains driven equipment or appliances to relay module as lethal current will be present.

R29.90  Inc VAT
One way Solid State Relay Module (2A3 Solid state relay single)
Description:

5V Omron solid state relays 240V / 2A, output with resistive fuse 240V / 2A.
Dimensions: 25x34x25 (length x width x height)
Input Power: 5VDC
Control signal input voltage: (0-2.5V low state relay ON) (3-5V state high relay OFF)

Feature:

Voltage:5V
Quiescent current: 0 mA
Operating current: 12.5mA
Trigger Voltage: 3.3-5V
Trigger current: 2mA
DC +: positive power supply (according to the relay voltage supply)
DC-: negative power supply
CH1: relay module signal triggering end (low to trigger active)

Package included:

1 x One way Solid State Relay Module

Relay tutorial for Raspberry Pi
R59.90  Inc VAT
Four Way Solid State Relay Module (2A3 solid relay 4 red)
Description:

5V Omron solid state relays 240V / 2A, output with resistive fuse 240V / 2A.
Dimensions: 57x55x25 (length x width x height)
Input Power: 5VDC
Control signal input voltage: (0-2.5V low state relay ON) (3-5V state high relay OFF)

Features:

Voltage:5V
Quiescent current: 0 mA
Operating current: 12.5mA
Trigger Voltage: 3.3-5V
Trigger current: 2mA

DC +: positive power supply (according to the relay voltage supply)
DC-: negative power supply
CH1: relay module signal triggering end (high to trigger active)
CH2: relay module signal triggering end (high to trigger active)
CH3: relay module signal triggering end (high to trigger active)
CH4: relay module signal triggering end (high to trigger active)

Package includes:

1 x Four way Solid State Relay Module

Python Code
R190.66  Inc VAT
Relay for micro:bit (3A5 micro:bit Relay board)

The MonkMakes Relay for micro:bit is a solid-state (no moving parts) relay that allows an output of a micro:bit to turn things on and off.

A micro:bit can turn an LED on and off directly, but anything more powerful requires something like a relay or a transistor. Using a transistor to switch something on and off requires a shared ground connection with the micro:bit and a knowledge electronics that you or your students may not be ready for. The MonkMakes Relay for micro:bit is much easier to use, acting like a simple micro:bit controlled switch.

This relay can be used to switch low voltage devices such as light bulbs, a motor, a small heating element or even a string of 12V LED lighting. The voltage needs to be kept under 16V, but the relay will automatically protect itself against too much current.

FEATURES

  • Solid-sate relay (up to 2 Amps)
  • Active LED indicator
  • Resettable ‘polyfuse’ to protect against over-current

Getting Started

Connecting your micro:bit

The Relay requires just two connections to the micro:bit. One to GND (ground) and one to whatever pin is to be used to control the relay’s switching action.

When attaching the alligator clips to the micro:bit, make sure that the clips are perpendicular to the board so that they are not touching any of the neighbouring connectors on the micro:Bit edge connector.

Here’s an example of how you could wire up a MonkMakes Relay for micro:bit to turn an old fashioned light bulb on and off.

HEX File

The quickest way to try out your relay is to DOWNLOAD THIS HEX FILE >and then copy it onto your micro:bit. The program will turn the relay on and off once a second.

JavaScript Blocks Editor

Set the controlling pin to 1 and the relay contacts will close, set it to 0 and the contacts will open again. Its as simple as that. So, to make your relay turn on and off once a second, open the Blocks Editor, add a forever block and then the digital write blocks from the pins category and the pauses from the basic category.

MicroPython

Paste the following code into the Python window and then Download the file and copy it onto your your micro:bit.

from microbit import *

while True:
    pin0.write_digital(True)
    sleep(500)
    pin0.write_digital(False)
    sleep(500)



Analog Outputs

The latest MonkMakes Relay for micro:bit can do more than just switch things on and off. It can also be used with micro:bit analog outputs. Look closely at your Relay for micro:bit and is it has the version number v1ev (under the word ‘Board’) then it can be used with the ‘analog write’ block in the blocks editor or the ‘write_analog’ function in MicroPython. If your board has the version number v1e then it is not suitable for use with analog outputs – sorry you were unlucky to get one of the small batch of first boards to be sold.

The output of the Relay for micro:bit is not linear at low PWM and high PWM values as the following chart illustrates.

The y-axis shows the current in mA for a test load resistor supplied from a constant voltage source. The x-axis is the analog write value (0 to 1023). As you can see, there is a dead zone up to a analog output value of about 100, followed by a relatively good linear region right up to about 1000, after which the output effectively becomes ‘on’.

The tests were carried out at the default PWM frequency of 50Hz for the micro:bit. Lower frequency PWM is expected to produce more linear results.

The MonkMakes Relay for micro:bit is a solid-state (no moving parts) relay that allows an output of a micro:bit to turn things on and off.
R169.90  Inc VAT
433Mhz Geekcreit® DC 12V 10A Relay 1Channel Wireless RF Remote Control Relay (2A2 1 channel relay remote)
Features:

Easy to use.
Operating Voltage: DC12V
Maximum Load: 10A
Operating Frequency: 433MHZ
Receiver Sensitivity: -100dBm
Encoding Type: learning code
Board Size: Approx. 5.3x3.1cm/ 2.09x1.22"

Relay rating:

  • 10A 250VAC
  • 10A 125VAC
  • 10A 30VDC
  • 10A 28VDC

To check compatibility of a new remote with the receiver. Simply press the button on the remote, if the receiver flashes, but does not Triger the relay. The remote will be compatible, and you can start the programing process

To add a remote, press the button on receiver momentarily. The red light will come on. Then press the button on the remote that you want to program in. The red light will start flashing. After 4 flashes in will stop, and the button will be programmed in.

For the setting to take effect, the board needs to be disconnected from it’s power supply. The bellow settings will be done to the 3 headers and bridge pin on the receiver board, above the push button.

  • With the header removed, the On button will switch the relay on, and the off button will in turn switch the relay off.
  • With the header on Pin 1-2. Both Buttons will become momentary. And only hold the relay in place as long as they are pressed in.
  • With the header on Pin 2-3. Each button will be able to switch the relay on and off individually. You will however not be able to switch the button off with the “off” button, if you switched it on with the “on” button. And vise versa.


Package Includes:

1 x Learning Code Receiver Relay
1 x Remote Control
R139.90  Inc VAT
5V 1 Channel Level Trigger Optocoupler Relay Module (2A6 single relay red board)
Description:

The module uses a quality relay with a normally open interface
Using SMD optocoupler isolation, driving ability, stable performance
The module can be set high or low with a jumper setting trigger
Fault-tolerant design, even if the control line is broken, the relay will not operate
A power indicator (green) and a relay status indicator (red)

Specification:

Maximum load: AC 250V/10A, DC 30V/10A
Trigger current: 5mA
Working voltage: 5V
Module size: 50mm x 26mm x 18.5mm (L x W x H)
Four mounting bolt holes, diameter 3.1mm

Module interface:

DC+: positive power supply (VCC)
DC-: negative power supply (GND)
IN: can be high or low level to control the relay

Relay outputs:

NO: normally open
COM: Common Interface
NC: normally closed

High and low level trigger options:

It is low level trigger when jumper connects to LOW pin
It is high level trigger when jumper connects to HIGH pin

Package includes:

1 x 1 Channel H/L level trigger optocoupler relay module

Interfacing with a relay
R29.90  Inc VAT
Mini 5V DC Power Relay SRD-5VDC-SL-C 5 Pin PCB Type (2A3 pcb relay blue single)
Features:

Simple relay magnetic circuit to meet low cost of mass production

Specifications:

Model: SRD-5VDC-SL-C
Coil voltage: DC 5V
Coil resistance: 70Ω ~ 80Ω
Contact resistance: 100Ω Max
Operation time: 10msec Max
Release time: 5msec Max
Ambient temperature: -25°C to 70°C
Operating humidity: 45 to 85%RH
Operating current: 43mA ~ 46mA
Release current: 15mA ~ 18mA
Pin: 5Pin
Insulation resistance: ≥100M (Ohm)
Dielectric strength:
Between coil & contacts: AC 1500V 50HZ ~ 60HZ/min
Between contacts: AC 1000V 50HZ ~ 60HZ/min
Rated load:: 10A 250V AC / 10A 125V AC / 10A 30V DC / 10A 28V DC
Size: 1.8 x 1.5 x 1.6cm (L x W x H)


Package includes:

1 x SRD-5VDC-SL-C 5V Power Relay
R24.90  Inc VAT
Ethernet Control Module With 8 CHs Relay Board For LAN WAN WEB Server RJ45 Android iOS (2B6 Ethernet relay bord)
Overview:
 
This is an Ethernet Controller board based on Imatic system which is compatible with the 8 Channel relay board(included). 
Using the Controller module and the 8 Channel relay board, you can control up to 8 devices remotely on LAN or WAN. 
The Ethernet Controller board has an integrated web server. When you are in your office, you just need to open the page on your computer, pad or smartphone and control your devices eg. lights, air-conditioning or refrigerator in your home.
 
Features:
 
  • Control switches remotely together with 8 Channel relay.
  • RJ45 interface, via RJ45 telecommunications connection for network control.
  • Support for 8 Channels relay which means you can control 8 different devices at the same time.
  • Unique dual TCP connect control, corresponding with above trait, local as TCP server
  • Accepts client control, when connect to remote server as TCP client
  • Supply core module detailed information. Default IP: 192.168.1.4 port:30000       http://192.168.1.4/30000    (You can change the default IP address)
 
HTTP comments:
 
http://192.168.1.4/30000/00 : Relay-01 OFF
http://192.168.1.4/30000/01 : Relay-01 ON
http://192.168.1.4/30000/02 : Relay-02 OFF
http://192.168.1.4/30000/03 : Relay-02 ON
http://192.168.1.4/30000/04 : Relay-03 OFF
http://192.168.1.4/30000/05 : Relay-03 ON
 
 
http://192.168.1.4/30000/14 : Relay-8 OFF
http://192.168.1.4/30000/15 : Relay-8 ON
http://192.168.1.4/30000/41 : Enter
http://192.168.1.4/30000/40 : Exit
http://192.168.1.4/30000/42 : Next Page
http://192.168.1.4/30000/43 : Next Page



Package includes:

1 x Ethernet Control Module
1 x 8 CH Relay
R659.90  Inc VAT
Soil Moisture Sensor 12V DC Relay Control Module Automatic watering switch (2A6 automatic water relay sensor)

When the soil moisture is lower than preferred setting, the relay will automatically pull in, start the sprinkler, water pump etc. until the moister reaches the desired humidity level and automatically stop.

 

Product use:

Through the potentiometer, adjust to the desired soil moisture level

Electrical parameters:
Supply voltage: 12VDC
Input current: more than 100mA
Relay Load Max: 10A 250V AC or 10A 30V DC
 
Module instruction:
1 sensors applied to the detection of soil moisture;
Module
2. Blue potentiometer is used to adjust soil moisture level, clockwise adjustment and control the humidity will be bigger, counterclockwise smaller;
3. Due to module delay function, adjust the humidity value, wait about 5-8 seconds, see if the the relay state changed, the green LED lamp will also have corresponding change, until adjusted to meet the requirements.
 
Package Includes:
1 x Soil moisture control module
1 x Soil sensor
2 x 20cm long DuPont lines
R59.90  Inc VAT
DC 12V PIR IR Sensor Module Relay (2B2 12VDC pir relay occupancy)
Features:

Based on infrared technology, automatically control products, when someone enters switch sensing range, pir detect changes in the human body infrared spectrum, switch automatically switches the load, do not leave the sensing range (who are active), the switch will continue to be on.

Person leaves, switch off automatically load delay.

Convenient and  saves energy.

Specifications:

1. Bipolar design: three-wire connection, and the load capacity 100W

2. Automatic sensors: switch immediately turned on with delay off after you leave.

3. Relay switch: can withstand high current output, high power load.

4. Adjustable delay time: 10 seconds -350 seconds

5. Ultra Low Power: Switch own power <0.0088W/h (annual power consumption of <0.077 degrees)

6. Induction: Passive

7. Operating Voltage: DC 12V

7. Inductive mode: passive infrared pyroelectric

6. Quiescent Current: 50uA

7. Sensing Distance: 3 to 5m

8. Load Capacity: Maximum: 100W

9. Induction Angle: About 120°, 100 ° up and down

10. Load Range: Various types of DC LED lamps, load

11. Ambient Temperature: -20 to +50℃

12. Output Mode: Relay control output DC 12V high level / low level

13. Size: 45 x 30mm, PIR lens diameter: 12mm

Wiring instructions:

Red wire: Power input + 12V
Black wire: Power output -12V
Yellow wire: OUT + 12V power output

Package includes:

1 x DC 12V PIR IR Sensor Module Relay
R96.90  Inc VAT
Relay Board (T1 KT relay kit)
Product Description

This is a versatile relay board kit that can easily be configured via jumpers and trimmer potentiometers to do a range of tasks.

Most sensor and switches can be connected to the input of the board and the trigger level set for the input device. This can be inverted if required, then there is the option to feed this straight to the relay or a timer of up to 25 minutes can be used. Irrespective of the state of the invert jumper whenever the sense LED goes from off to on the timer restarts.#

The board can run off any voltage from 4.5 to 6 volts.

The output cans switch DC or mains.

This datasheet details what the board does and how to use it along with some worked examples. A more detailed set of information including the build instructions & how to configure the kit can also be downloaded.

Click here to download the full teaching notes pdf_icon.gif

WARNING: Using mains electricity can be dangerous and should only be attempted by qualified electricians.

This kit includes:

  • 3 x 100Kohm resistors
  • 3 x 220ohm resistors
  • 1 x 47Kohm resistors
  • 1 x 1Mohmpotentiometer
  • 1 x 10Mohm potentiometer
  • 2 x 1N4001 diodes
  • 2 x 5mm red LEDs
  • 1 x 100uF capacitors, electrolytic
  • 1 x 4.7uF capacitors, electrolytic
  • 1 x 2N7000 n-channel FET
  • 2 x 2 way terminal blocks
  • 1 x 3 way terminal blocks
  • 1 x LM324 operational amplifier IC
  • 1 x 14 pin IC holder
  • 2 x 3 way pinstrip
  • 2 x Jumpers
  • 1 x Relay
  • 1 x Relay board PCB

PCB dimensions: 86.5mm x 49mm.

This kit is supplied as a pack of parts and requires soldering.

R159.90  Inc VAT
Aluminum Alloy Heat Sink For Solid State Relay SSR Heat Dissipation (SSR relay heat sink)
Description:

Brand new and high quality.
New heat sink for solid state relay SSR
Aluminium alloy
Come with a aluminum heat sink provides long lasting usage, it will help dissipate the heat and protect your relay.
Solid State Relay ideal for automatic process control application, a must component for temperature controller and other machinery control system.

Specification:

Materail: Aluminium alloy.
Size:Roof:50mm x 60mm.Foot:80mm x 50mm.
Height:43mm.
Weight:96g
Compatible with:Designed specially for single phase solid state relay.
Color :Silver

Package includes:

1 x Solid state relay heat sink

R89.90  Inc VAT
WS Waveshare RPi 3xRelay Board (2A3 WS 3 relay board)

Please note: Raspberry Pi not included

Overview

The RPi Relay Board gives your Pi the ability to control high voltage/high current devices, easily makes normal home appliances become intelligent.

RPi Relay Board Features

  • Supports Raspberry Pi A+/B+/2B/3B
  • High quality relays, loads up to 250VAC/5A, 30VDC/5A
  • Photo coupling isolation, prevent interference from high voltage circuit
  • Onboard LEDs for indicating relays status
  • Relay control jumper, allows to control the relays by custom pins other than the default pins
  • Comes with development resources, including examples in wiringPi, WebioPi, shell, python, and bcm2835

What's on the RPi Relay Board


  1. Raspberry Pi GPIO interface: for connecting Raspberry Pi
  2. Relay screw terminal: for connecting target devices
  3. Relays
  4. Photocoupler: PC817
  5. Relay indicator
    • LED on: relay NC is opened, NO is closed
    • LED off: relay NC is closed, NO is opened
  6. Power indicator
  7. Relay control jumper
    • short the jumper: control the relays by default I/Os used in the example code
    • open the jumper: control the relays by custom I/Os through jumper wires

Development Resources

Wiki : www.waveshare.com/wiki/RPi_Relay_Board

Package Includes:

  1. RPi Relay Board x 1
  2. RPi screws pack (2pcs) x 1
R219.90  Inc VAT
Raspberry Pi 8-channel Relay Expansion Board with DIN rail mounting brackets (2A6 DIN rail relay board)

Please note: Raspberry Pi is not included

Overview

The RPi Relay Board (B) is an expansion board with 8-ch relays for Raspberry Pi. It gives your Pi the ability to control high voltage products such as home appliances.

Features

  • Supports Raspberry Pi A+/B+/2B/3B/3B+
  • High quality relays, loads up to 5A 250V AC or 5A 30V DC
  • Photo coupling isolation, prevent interference from high voltage circuit
  • Standard rail mount bottom case
  • Onboard LEDs for indicating relays status
  • Relay control pin selection jumper, allows to control the relays by custom pins other than the default pins
  • Reserved control Interface, allows to work with controllers like PLC
  • Comes with development resources, including examples in wiringPi, bcm2835, python, python-bottle (webpage control), and crontab (cron job)

Specifications

  • Power supply voltage: 5V
  • Trigger signal: 3.3V/5V
  • Relay channels: 8-ch
  • Contact form: SPDT-NO,NC
  • Closed current: 6mA (per channel)
  • Connector: screw terminal block
  • Dimension: 232 × 72 (mm)
  • Mounting hole size: 3.0mm

Dimensions

Development Resources

Wiki : www.waveshare.com/wiki/RPi_Relay_Board_(B)

R319.90  Inc VAT
Solid State Relay SSR-50DA 3-32VDC 50A/250V Output 24-380VAC w/ Cover (2A6 3-32V relay solid state)
Specification:
Size62mm(L)x44mm(W)x23mm(H)
Input Voltage (Trigger)
DC 3-32V 
Output Voltage(Line)AC 24-380V
Output Current(Line)50 A
On Voltage≤1V
On-Off Time≤10ms
Off Leakage Current≤2mA
Transparent Lid Included Yes

Package Includes:
1 X 50A SSR-50DA Solid State Relay With Cover

Depending on how hard your relay works, you might want to add a heat sink to it.

R149.90  Inc VAT
SONOFF® SV DC 5V-24V DIY WIFI Wireless Switch Socket Module APP Remote Control For Smart Home (4A1 sonoff relay pcb(no housing))
Overview:
 
Sonoff SV is a low voltage switch. The low voltage light switch supports 5-24V power supply. Power supply separation enables it to control both AC and DC power, although some welding is required for this purpose. It has GIPO reserved to support secondary development. This product does not have 433 RF function and shell.
Sonoff SV low voltage WiFi switch is an affordable device that provides customers with smart home control. The low voltage WiFi switch is a WiFi based wireless switch that can connect to a wide range of appliances. Sonoff SV low voltage remote switch transmits data to a cloud platform through the WiFi router, which enables customers to remotely control all the connected appliances, via the mobile application eWeLink. The cloud server of Sonoff SV is Amazon AWS global server.
Sonoff SV low voltage wireless remote switch makes all home appliances smart. As long as the mobile has network, customers can remotely control the appliances by turning them on off from anywhere at any time. Another feature available is to set timing schedules for the appliances, which can include countdown, scheduled on/off, and can thus, help customers maintain an easy life.
The mobile application eWeLink enables customers to control the appliances easily. The iOS version of the application can be downloaded in App Store while the Android version in Google Play.
 
Works With Amazon Alexa:
This product works with Amazon Alexa. You can ask Alexa to control the device with the following voice commands. Please note that only US/UK English and German voice commands are supported now.
 
Try out these phrases ( {deviceName} should be the name of your device):
Alexa, turn on {deviceName}
Alexa, turn off {deviceName}
Alexa, turn {deviceName} off
Alexa, turn {deviceName} on
Alexa, schalte Gerätename ein
Alexa, schalte Gerätename aus
For detailed tutorial, please click here.
Check out the amazing features of Sonoff below:

Features:
 
Remote control the connected device on app from anywhere
Tracking real-time device status on app
Supports max 8 enabled schedule/countdown timers 
Reserves GIPO to support secondary development
Works with Amazon Echo, Echo Dot, Amazon Tap
Works with Google Home, Google Home Mini, Google Nest
Works with IFTTT
 
Specifications:
 
Power supply: 5~24V
Weight: 3x15g
 
Package includes:

1 x DC 5V-24V DIY Wifi Wireless Switch Sonoff SV Module
R159.90  Inc VAT
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