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Flashforge Adventurer 5M/5M Pro 0,8mm nozzle - 1,75mm filament - hardened steel

Index: FFO-25256

3D printer - Elegoo Saturn 4 Ultra - resin-based

Index: ELG-25515

Gravity - IPS 2'' 320x240px LCD display - I2C/UART - colour - DFRobot DFR0997

Index: DFR-25399

Raspberry Pi 5/16GB

Index: RPI-25860

Gravity - Human Presence Detection Sensor - C4001 - mmWave 24GHz sensor - DFRobot SEN0610

Index: DFR-25320

Gravity - infrared light photo interrupter module 5mm - ITR9608 - 940nm - DFR1129

Index: DFR-25292

Sonoff THS01 - temperature and humidity sensor, RJ9

Index: INN-25481

Limit switch 50mm - Pololu 1403

Index: PLL-00017

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Phototransistor TEFT4300 3mm 925nm

Index: UCC-00446

Filament Fiberlogy FiberSatin 1,75mm 0,85kg - Pink

Index: FLA-19803

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OLED blue graphic display 1,3'' 128x64px I2C v2 - blue characters

Index: MOD-08246

Power Supply ATX Akyga Basic 500W

Index: ZAS-06827

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3D printer Creality Sermoon V1 Pro XY-axis limit switch kit

Index: CRL-21517

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WiFi ESP8266 HAT with LCD 1,14'' 240x135px display for Raspberry Pi Pico - SB...

Index: SBC-20404

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Set: LED strip SMD3528 IP65 4,8W, 60 diode/m, cold white - 5m + 12V/3A power supply

Index: LED-09683

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H2/H3 2 Net Card for Odroid H2/H2+/H3/H3+ 4x Ethernet 2,5Gb

Index: ODR-18782

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Filament Fiberlogy FiberSatin 1,75mm 0,85kg - Green

Index: FLA-19805

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Digital temperature sensor - STTS22H - micro version - Qwiic - SparkFun SEN-21273

Index: SPF-22679

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Adapter XBee PCB socket - SparkFun BOB-08276

Index: SPF-01600

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Industrial Pi EPC-CM4-050 - Raspberry Pi CM4 Compute Module 4 CM4102032 + 5'' display

Index: CHI-22234

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Relays

A relay is an electrical device that distributes power based on an order issued by the control part. In this way, a relay allows the opening and closing of an electrical power circuit based on logical information. The primary function of relays is most often to separate the control circuits from the power circuits for isolation purposes, e.g. to drive a high voltage or current from a lower control, and in some applications also to ensure operator safety. Although it may sound complicated, it is one of the principles of eclectic networks and can help us understand how electronic gadgets work on connectivity. In this section of the Botland store you can find many relays that will help you to explore the secrets of this learning and help you gain the right skills. If you have any questions or concerns, do not hesitate to contact our technical department. We are happy to share our knowledge and experience.

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Traditional relays - miniature, latching (10)

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Products: 78

Numato Lab - 8-channel relay module 12V 10A/250VAC + 10GPIO - Ethernet

The module has eight HF3FF 012-1ZST relay with a coil supplied with voltage of 12 V. The system is controlled via Web interface or TELNET. In addition, the module has 10 GPIO...

Index: MOD-11659

Index: MOD-11659

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Relay module combined light-operated switch 12V 10A/125VAC

Relay module combined light-operated switch 12V 10A/250VAC

The module is equipped with SRD-12 relay with a coil powered with a voltage of 12 V with mounting holes. The system allows you to control the actuators depending on the...

4.8 (6)

Index: MOD-06253

Index: MOD-06253

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Tinycontrol GSMKON-010 - relay board 4x16A/coil 12V for GSM/LAN controller

The module is equipped with 4 Relpol relay a coil supplied with a voltage of 12V, with optical isolation input and mounting holes. The system is designed to work with GSM and...

Index: TNC-08291

Index: TNC-08291

16 channel relay module with optical insulation - contacts 10A/250VAC - coil 5V

The module has sixteen relays SRD-05 with a coil powered with a voltage of 5 V along with optoelectronic insulation. The system allows you to control the actuators with...

5.0 (4)

Index: MOD-06940

Index: MOD-06940

Relay MPJ2-S-212-C - 12V coil, 2x 5A / 240VAC contacts

Coil voltage: 12 V, contacts: 5 A / 240 VAC. Dimensions: 29 x 12.6 mm, height: 20,6 mm.

4.9 (7)

Index: PRO-11597

Index: PRO-11597

Moduł przekaźnika z izolacją optoelektroniczną

Relay module 2 channels H/L with optoisolation - 10A/250VAC contacts - 5V coil

The module has two SRD-05 relays with the coil powered with the voltage of 5 V with optical isolation of the input and mounting holes. The system allows you to control...

5.0 (7)

Index: MOD-06551

Index: MOD-06551

Relay module 2 channels H/L with optoisolation - contacts 10A/250VAC - coil 12V

The module has two SRD-05 relays with the coil powered with the voltage of 12 V with the optical insulation of the input and mounting holes. The system allows you to control...

5.0 (24)

Index: MOD-06552

Index: MOD-06552

Three-phase Solid state relay SSR Hoymk D4825HK 3x25A 380VAC / 32DC

The Hoymk D4825HK three-phase relay is made in semiconductor technology and controlled with voltages from 3 V to 32 V DC. The maximum output voltage is 380 V.

Index: DLT-14507

Index: DLT-14507

2-channels relay Grove with optoisolation - 10A/250VAC - coil 5V + clear case

Grove - 2-channels relay with optoisolation - 10A/250VAC - coil 5V + clear case

The module has two SRD-05 relays with the coil powered with the voltage of 5 V with optical insulation of input and mounting holes. The system allows you to control...

5.0 (3)

Index: SEE-12626

Index: SEE-12626

Relay module 4 channels + Bluetooth 4.0 BLE - 10A / 250V contacts - 5V coil

The module has four SRD-05 relays with a coil powered with the voltage of 5 V, it was also equipped with a module Bluetooth 4.0 BLE allowing ot control the devices via Android...

4.0 (1)

Index: GRL-10909

Index: GRL-10909

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Relay module 4 channels - 10A/250VAC contacts - 5V coil

Quadruple module is equipped with SRD-05 relay with a coil powered with the voltage of 5 V, the transistor amplifier and mounting holes. The system allows you to control...

5.0 (7)

Index: MOD-01998

Index: MOD-01998

Tinycontrol LANKON-094 - relay module 4x10A /coil 5V for GSM/LAN controller - for DIN rail

The module is equipped with 4 RELPOL RM50 relay a coil supplied with a voltage of 5V, with optical isolation input and mounting holes. The system is designed to work with LAN...

Index: TNC-08293

Index: TNC-08293

Semiconductor relay SSR-80A 480VAC / 80A - 32VDC

Solid state relay, single-phase SSR with the AC voltage of 480 V and constant of 32 V. Rated current is 80 A. The device does not create noise when switching.

Index: AKS-10220

Index: AKS-10220

Relay MCB-S-212-C-S - coil 12V, contacts 2x 1A / 125VAC

Coil voltage: 12 VDC, contacts: 1 A / 125 VAC. Dimensions: 20,2 x 10 mm, height: 11.5 mm.

5.0 (3)

Index: PRO-11585

Index: PRO-11585

Relay module 8 channels with optocoupler - 10A/250VAC contacts - 5V coil - Modbus RS485

Relay 8 channel module with optoisolation - 10A / 250VAC contacts - 5V coil - Modbus RS485 - Waveshare 17658

The module has 8 relays capable of switching 230 V AC or 30 V DC and a maximum current of 10 A . The relay coil is energized by 5 V. The module communicates via RS485...

5.0 (1)

Index: WSR-16406

Index: WSR-16406

Transistor switch with adjustable delay - 15A / 30V

The module equipped with transistors powered with the voltage from 5 V to 30 V. T he system allows you to control actuators using microcontroller ports or any development set ....

5.0 (6)

Index: GRL-12126

Index: GRL-12126

Grove - relay 1 channel - 30A-250VAC / 30VDC contacts - 5V coil

Module with relay that control the actuators consuming the current of up to 30 A for the voltage of 250 V AC, 30 V DC using the ports of the microcontroller. The module is...

Index: SEE-11351

Index: SEE-11351

Inveo Nano OUT - IoT module with relay

Inveo modules allow remote control of a device via the Internet. It has 1 relay output of 250 V and a built-in WEB server.

Index: INV-09120

Index: INV-09120

Tuya RTX WRS2 - 2x relay 100-240V AC WiFi

Ready-made two-channel WiFi relay module. The device allows you to control two 100-240V AC devices with a maximum power consumption of 1150 W or two LED lighting sources...

5.0 (2)

Index: REM-16912

Index: REM-16912

16-channel relay module with optoisolation - 10A / 250VAC contacts - 12V coil

The module is equipped with sixteen JQC3F-12VDC-C relays with a 12-volt coil with optoelectronic isolation. The system allows you to control the actuators using the...

4.9 (10)

Index: MOD-06941

Index: MOD-06941

Grove - 4 channel relay SPDT

High-class 4-channel relay for using the maximum voltage of 250 V and a current of 10 A.

5.0 (7)

Index: SEE-14418

Index: SEE-14418

DFRobot Gravity - relay 1 channel - 10A/277VAC contacts - 5V coil

Module with relay that allows for the control of the actuators consuming the current of up to 12 A for the voltage of 125 V or 10 A for 277 V through the ports of the...

Index: DFR-05964

Index: DFR-05964

Relay module 1 channel with delay - 10A / 250VAC contacts - 5 V coil

The module is equipped with relay SRD-05 with a coil powered with a voltage of 5 V. The system allows you to control actuators using microcontroller ports or any development...

5.0 (5)

Index: GRL-10917

Index: GRL-10917

Relay module 1 channel - 3A/250VAC contacts - 5V coil

The module is equipped with HK4100F relay with the voltage of 5 V. T he system allows you to control the actuators with a voltage of 250 V AC / 30 V DC , using the ports...

5.0 (2)

Index: OST-14297

Index: OST-14297

Where are relays used?

Industry was once thought to be the main field where relays were used. There is some truth in this, because we actually find relays in many machines and powerful control systems. Currently, however, they are used to an increasing extent in everyday devices, especially if we want to ensure a higher level of automation. Relays can be found in most homes, especially those of the "smart home" type, where most things operate on commands and are extremely modern and rely on electronic systems. Moreover, relays are used, for example, for automatic entrance gates, to control ventilation or heating, and for protection systems, e.g. motion sensors.

How to choose the right relay?

If we really don't know anything about relays, but we need to buy one, please contact the technical department of the Botland store. It is important to remember that a relay that does not work properly can cause a lot of damage. It can damage electrical devices or even entire electronic systems, so don't deal with this problem alone and contact us. In our store you will find:

- relay modules

- SSR semiconductor relays

- traditional relays

Therefore, every person designing a project or gadget will find the relay they need here. It is worth relying on us because we always offer the highest quality products. Every electronics enthusiast realizes that small, inconspicuous elements are often the most important. Relays are just such a thing. Without them, the operation of electronic devices and systems, as well as machines, would in many cases be impossible.

Relays, Arduino relays - FAQ

What is the Arduino relay used for?

An Arduino relay is commonly referred to as shields and modules compatible with popular motherboards , which are equipped with one or several electromagnetic relays and are used to control external loads (LED lighting, fan, heater, various network devices, etc.).

How does the Arduino relay work?

An Arduino relay is most often simply a module containing an electromagnetic relay with a simple electronic circuit that allows you to control the relay coil directly from the Arduino GPIO output. In most cases, a transistor is used for this purpose, which - after providing the appropriate logical state - turns on the relay coil, thus switching its contacts.

How does a relay work?

The principle of operation of the relay is based on the attraction of a metal anchor by a small electromagnet - the anchor, mechanically connected to movable contacts , switches the output circuits, enabling the switching on of an external load (even with high current consumption) using a small signal sent to the electromagnet coil.

How to choose a relay?

Selection of a relay involves determining the basic parameters of the input ( electromagnet coil) and output (switchable contacts). In the case of a coil, the type of control voltage (AC or DC) and its value (e.g. 12 V) and current (e.g. 100 mA) are provided. The contacts are also characterized by the maximum operating voltage (e.g. 250 VAC) and current (e.g. 10 A).