Shop Single Channel Relay Board

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$39.99
Sainsmart 16-Channel 9-36V USB Relay Module
Amazon.com
37
Free shipping
$39.99
Sainsmart 16-Channel 9-36V USB Relay Module
Amazon.com
37
$15.99
Dafurui 5V Relay Module8pack 1 Channel Relay Module 5V Relays Board With Optocoupler Support High/Low Level Trigger For Arduino Relays
Amazon.com
138
$15.99
Dafurui 5V Relay Module8pack 1 Channel Relay Module 5V Relays Board With Optocoupler Support High/Low Level Trigger For Arduino Relays
Amazon.com
138
$5.89
Hiletgo 12V 1 Channel Relay Module With Optocoupler Isolation Support High Or Low Level Trigger
Amazon.com
377
$5.89
Hiletgo 12V 1 Channel Relay Module With Optocoupler Isolation Support High Or Low Level Trigger
Amazon.com
377
$8.59
JQC-3FF-S-Z Relay 5V Low Level Trigger One 1 Channel Relay Module Interface Board Shield For PIC AVR DSP ARM MCU Arduino
Amazon.com
$8.59
JQC-3FF-S-Z Relay 5V Low Level Trigger One 1 Channel Relay Module Interface Board Shield For PIC AVR DSP ARM MCU Arduino
Amazon.com
$9.50
Single-Channel Relay Module For Raspberry Pi Zero/2B/3B/4B, STM32, ESP32, Arduino - 3.3V/5V Relay Expansion Board With Optocoupler Isolation & LED
Amazon.com
5
$9.50
Single-Channel Relay Module For Raspberry Pi Zero/2B/3B/4B, STM32, ESP32, Arduino - 3.3V/5V Relay Expansion Board With Optocoupler Isolation & LED
Amazon.com
5
$8.48
Solid State Relay Module, 1 Channel DC 5V/12V 2A SSR Module Board With Low Level Trigger(5V)
Amazon.com
6
$8.48
Solid State Relay Module, 1 Channel DC 5V/12V 2A SSR Module Board With Low Level Trigger(5V)
Amazon.com
6
$7.29
MECCANIXITY 1 Pcs DC 12V 1 Channel Relay Module Switch Board Shield 10A High Or Low Level Trigger For Electronics Industrial Home Automation
Amazon.com
$7.29
MECCANIXITY 1 Pcs DC 12V 1 Channel Relay Module Switch Board Shield 10A High Or Low Level Trigger For Electronics Industrial Home Automation
Amazon.com
$19.99
Mioyoow ESP32-C3 Single-Channel Fidelity Relay Switch Development Board ESP-C3-12F Remote Switch Control Module Supporting AC 90V-250V & DC 7V-12V
Amazon.com
$19.99
Mioyoow ESP32-C3 Single-Channel Fidelity Relay Switch Development Board ESP-C3-12F Remote Switch Control Module Supporting AC 90V-250V & DC 7V-12V
Amazon.com
$9.99
1 Channel 12V Relay Module Board Shield With Optocoupler Support High/Low Level Trigger Compatible Relay(Pack Of 8) (12V)
Amazon.com
5
$9.99
1 Channel 12V Relay Module Board Shield With Optocoupler Support High/Low Level Trigger Compatible Relay(Pack Of 8) (12V)
Amazon.com
5
$28.49
Shelly 1 Mini Gen3 | Wifi Smart Switch Relay 1 Channel 8A | Home Automation | Bluetooth Gateway | Compatible With Alexa & Google Home | Ios Android
Amazon.com
165
$28.49
Shelly 1 Mini Gen3 | Wifi Smart Switch Relay 1 Channel 8A | Home Automation | Bluetooth Gateway | Compatible With Alexa & Google Home | Ios Android
Amazon.com
165
$5.98
Ferwooh 3PCS DC 5V 2Ma 1 Channel Relay Module Board Shield Extension Board Relay Plate Low Level Trigger AC 250V/10A, DC 30V/10A
Amazon.com
4
$5.98
Ferwooh 3PCS DC 5V 2Ma 1 Channel Relay Module Board Shield Extension Board Relay Plate Low Level Trigger AC 250V/10A, DC 30V/10A
Amazon.com
4
$10.99
1 Channel Relay Shield Module, 10PCS DC 5V Indicator Light LED Module For Arduino R3 MEGA 2560 1280 ARM PIC AVR STM32 Raspberry Pi MCU DSP Official
Amazon.com
20
$10.99
1 Channel Relay Shield Module, 10PCS DC 5V Indicator Light LED Module For Arduino R3 MEGA 2560 1280 ARM PIC AVR STM32 Raspberry Pi MCU DSP Official
Amazon.com
20
$11.29
Hiletgo 12V 8 Channel Relay Module With OPTO-Isolated High And Low Level Trigger 8 Ways Relay Switch Module For Arduino
Amazon.com
205
$11.29
Hiletgo 12V 8 Channel Relay Module With OPTO-Isolated High And Low Level Trigger 8 Ways Relay Switch Module For Arduino
Amazon.com
205
$20.99
GUETNEU Relay Board, Relay Module 4 Channel 1 SPDT DIN Rail Mount 24V DC/AC, Interface Board(FY-T734C-D24)
Amazon.com
19
$20.99
GUETNEU Relay Board, Relay Module 4 Channel 1 SPDT DIN Rail Mount 24V DC/AC, Interface Board(FY-T734C-D24)
Amazon.com
19
$7.19
$7.99
EC Buying 2Pcs 24V Relay Module 1-Channel 30A With Optocoupler Isolation Relay Module High And Low Level Trigger
Amazon.com
10% off
$7.19
$7.99
EC Buying 2Pcs 24V Relay Module 1-Channel 30A With Optocoupler Isolation Relay Module High And Low Level Trigger
Amazon.com
$6.97
JESSINIE 5V 30A Relay Module, 1 Channel, Optocoupler Isolation, High/Low Trigger For Automation Control
Amazon.com
$6.97
JESSINIE 5V 30A Relay Module, 1 Channel, Optocoupler Isolation, High/Low Trigger For Automation Control
Amazon.com
$6.99
2Pcs DC 5V 1-Channel Relay Module Isolated By SMT Optocoupler High And Low Level Trigger Module Triggered By DC 5V
Amazon.com
10
$6.99
2Pcs DC 5V 1-Channel Relay Module Isolated By SMT Optocoupler High And Low Level Trigger Module Triggered By DC 5V
Amazon.com
10
$12.45
$14.39
RS485 12V 1-Channel Relay Module For PLC Controller Industrial Automation Systems
Amazon.com
13% off
$12.45
$14.39
RS485 12V 1-Channel Relay Module For PLC Controller Industrial Automation Systems
Amazon.com
$8.29
DZS Elec 5V-30V 1 Channel Wilde Voltage 0-24S Adjustable Delay Internal/External Trigger Relay Board With Timer Delay Conduction Delay Circuit Switch
Amazon.com
96
$8.29
DZS Elec 5V-30V 1 Channel Wilde Voltage 0-24S Adjustable Delay Internal/External Trigger Relay Board With Timer Delay Conduction Delay Circuit Switch
Amazon.com
96
$0.65
$1.30
DC 5V 9V 12V 24V 1 Channel Relay Module Board Shield With Optocoupler 12V Relay Module Support High
Aliexpress
50% off
$0.65
$1.30
DC 5V 9V 12V 24V 1 Channel Relay Module Board Shield With Optocoupler 12V Relay Module Support High
Aliexpress
$0.77
$1.10
1 Channel 5V 12V 24V Relay Module Board Shield With Optocoupler 12V Relay Module Support High And
Aliexpress
30% off
$0.77
$1.10
1 Channel 5V 12V 24V Relay Module Board Shield With Optocoupler 12V Relay Module Support High And
Aliexpress
$0.73
$2.72
DC 5V 1-Channel Bistable Relay Module Single Key Switch Relay Switch Control Module High Level
Aliexpress
Free shipping
73% off
$0.73
$2.72
DC 5V 1-Channel Bistable Relay Module Single Key Switch Relay Switch Control Module High Level
Aliexpress
Free shipping
$1.41
Universal 1-Channel Relay Control Board - 5V/12V/24V Low-Level Trigger Module For Arduino, ARM, AVR
Aliexpress
$1.41
Universal 1-Channel Relay Control Board - 5V/12V/24V Low-Level Trigger Module For Arduino, ARM, AVR
Aliexpress
$0.33
$0.35
5V 12V One 1 Channel Relay Module Board Shield With Optocoupler Support High And Low Level Trigger
Aliexpress
$0.33
$0.35
5V 12V One 1 Channel Relay Module Board Shield With Optocoupler Support High And Low Level Trigger
Aliexpress
$1.25
$1.27
5V 12V 24V Low Level Trigger 1 Channel Relay Module Interface Board Shield For PIC AVR DSP ARM MCU
Aliexpress
$1.25
$1.27
5V 12V 24V Low Level Trigger 1 Channel Relay Module Interface Board Shield For PIC AVR DSP ARM MCU
Aliexpress
$1.85
$2.53
Relay Module 1 Channel 5V 12V 24V Board Shield With Optocoupler Isolation Support High And Low Level
Aliexpress
26% off
$1.85
$2.53
Relay Module 1 Channel 5V 12V 24V Board Shield With Optocoupler Isolation Support High And Low Level
Aliexpress
$1.47
1-5Pcs DC 5V 9V 12V 24V 1 Channel Relay Module With Optocoupler Shield Board High Low Level Trigger
Aliexpress
$1.47
1-5Pcs DC 5V 9V 12V 24V 1 Channel Relay Module With Optocoupler Shield Board High Low Level Trigger
Aliexpress
$14.99
2PCS DC 12V 8 Channel Relay Module With Optocoupler Isolated Support High And Low Level Trigger 8 Ways Relay Switch Module (12V)
Amazon.com
$14.99
2PCS DC 12V 8 Channel Relay Module With Optocoupler Isolated Support High And Low Level Trigger 8 Ways Relay Switch Module (12V)
Amazon.com
$9.99
Hibctr 4 Packs 5V One Channel Relay Module Relay Switch With OPTO Isolation High Low Level Trigger.
Amazon.com
3
$9.99
Hibctr 4 Packs 5V One Channel Relay Module Relay Switch With OPTO Isolation High Low Level Trigger.
Amazon.com
3
$18.99
Cenrykay 5V 1 Channel Relay Module10pcs 5V Relay Module Board Switch Optocoupler Support High And Low Level Trigger For Arduino
Amazon.com
79
$18.99
Cenrykay 5V 1 Channel Relay Module10pcs 5V Relay Module Board Switch Optocoupler Support High And Low Level Trigger For Arduino
Amazon.com
79
$1.46
$4.05
5V 12V 24V Low Level Trigger One 1 Channel Relay Module Interface Board Shield For PIC AVR DSP ARM
Aliexpress
63% off
$1.46
$4.05
5V 12V 24V Low Level Trigger One 1 Channel Relay Module Interface Board Shield For PIC AVR DSP ARM
Aliexpress
$1.92
$3.96
DC 5V 12V 24V Relay Module 1 Channel Relay Board With Optocoupler Isolation Support High Or Low
Aliexpress
51% off
$1.92
$3.96
DC 5V 12V 24V Relay Module 1 Channel Relay Board With Optocoupler Isolation Support High Or Low
Aliexpress
$1.15
$1.35
5V 12V 24V 30A High Low Level Trigger 1 Channel Relay Module With Optocoupler Isolation Board Module
Aliexpress
14% off
$1.15
$1.35
5V 12V 24V 30A High Low Level Trigger 1 Channel Relay Module With Optocoupler Isolation Board Module
Aliexpress
$1.72
$3.37
13PCS KY-019 5V One 1 Channel Relay Module Board Shield For PIC AVR DSP ARM For Arduino Relay
Aliexpress
48% off
$1.72
$3.37
13PCS KY-019 5V One 1 Channel Relay Module Board Shield For PIC AVR DSP ARM For Arduino Relay
Aliexpress
$54.99
HKM-853267 1-Channel Single Relay Module Expansion Board For Industrial Computing Accessories 2026 Model
Hekomart.com
$54.99
HKM-853267 1-Channel Single Relay Module Expansion Board For Industrial Computing Accessories 2026 Model
Hekomart.com
$76.85
Single Axis Trim Relay Board 24V
AircraftSpruce.com
$76.85
Single Axis Trim Relay Board 24V
AircraftSpruce.com
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    Shop Single Channel Relay Board

    Sponsored
    About our ads
    $39.99
    Sainsmart 16-Channel 9-36V USB Relay Module
    Amazon.com
    37
    Free shipping
    $39.99
    Sainsmart 16-Channel 9-36V USB Relay Module
    Amazon.com
    37
    $15.99
    Dafurui 5V Relay Module8pack 1 Channel Relay Module 5V Relays Board With Optocoupler Support High/Low Level Trigger For Arduino Relays
    Amazon.com
    138
    $15.99
    Dafurui 5V Relay Module8pack 1 Channel Relay Module 5V Relays Board With Optocoupler Support High/Low Level Trigger For Arduino Relays
    Amazon.com
    138
    $5.89
    Hiletgo 12V 1 Channel Relay Module With Optocoupler Isolation Support High Or Low Level Trigger
    Amazon.com
    377
    $5.89
    Hiletgo 12V 1 Channel Relay Module With Optocoupler Isolation Support High Or Low Level Trigger
    Amazon.com
    377
    $8.59
    JQC-3FF-S-Z Relay 5V Low Level Trigger One 1 Channel Relay Module Interface Board Shield For PIC AVR DSP ARM MCU Arduino
    Amazon.com
    $8.59
    JQC-3FF-S-Z Relay 5V Low Level Trigger One 1 Channel Relay Module Interface Board Shield For PIC AVR DSP ARM MCU Arduino
    Amazon.com
    $9.50
    Single-Channel Relay Module For Raspberry Pi Zero/2B/3B/4B, STM32, ESP32, Arduino - 3.3V/5V Relay Expansion Board With Optocoupler Isolation & LED
    Amazon.com
    5
    $9.50
    Single-Channel Relay Module For Raspberry Pi Zero/2B/3B/4B, STM32, ESP32, Arduino - 3.3V/5V Relay Expansion Board With Optocoupler Isolation & LED
    Amazon.com
    5
    $8.48
    Solid State Relay Module, 1 Channel DC 5V/12V 2A SSR Module Board With Low Level Trigger(5V)
    Amazon.com
    6
    $8.48
    Solid State Relay Module, 1 Channel DC 5V/12V 2A SSR Module Board With Low Level Trigger(5V)
    Amazon.com
    6
    $7.29
    MECCANIXITY 1 Pcs DC 12V 1 Channel Relay Module Switch Board Shield 10A High Or Low Level Trigger For Electronics Industrial Home Automation
    Amazon.com
    $7.29
    MECCANIXITY 1 Pcs DC 12V 1 Channel Relay Module Switch Board Shield 10A High Or Low Level Trigger For Electronics Industrial Home Automation
    Amazon.com
    $19.99
    Mioyoow ESP32-C3 Single-Channel Fidelity Relay Switch Development Board ESP-C3-12F Remote Switch Control Module Supporting AC 90V-250V & DC 7V-12V
    Amazon.com
    $19.99
    Mioyoow ESP32-C3 Single-Channel Fidelity Relay Switch Development Board ESP-C3-12F Remote Switch Control Module Supporting AC 90V-250V & DC 7V-12V
    Amazon.com
    $9.99
    1 Channel 12V Relay Module Board Shield With Optocoupler Support High/Low Level Trigger Compatible Relay(Pack Of 8) (12V)
    Amazon.com
    5
    $9.99
    1 Channel 12V Relay Module Board Shield With Optocoupler Support High/Low Level Trigger Compatible Relay(Pack Of 8) (12V)
    Amazon.com
    5
    $28.49
    Shelly 1 Mini Gen3 | Wifi Smart Switch Relay 1 Channel 8A | Home Automation | Bluetooth Gateway | Compatible With Alexa & Google Home | Ios Android
    Amazon.com
    165
    $28.49
    Shelly 1 Mini Gen3 | Wifi Smart Switch Relay 1 Channel 8A | Home Automation | Bluetooth Gateway | Compatible With Alexa & Google Home | Ios Android
    Amazon.com
    165
    $5.98
    Ferwooh 3PCS DC 5V 2Ma 1 Channel Relay Module Board Shield Extension Board Relay Plate Low Level Trigger AC 250V/10A, DC 30V/10A
    Amazon.com
    4
    $5.98
    Ferwooh 3PCS DC 5V 2Ma 1 Channel Relay Module Board Shield Extension Board Relay Plate Low Level Trigger AC 250V/10A, DC 30V/10A
    Amazon.com
    4
    $10.99
    1 Channel Relay Shield Module, 10PCS DC 5V Indicator Light LED Module For Arduino R3 MEGA 2560 1280 ARM PIC AVR STM32 Raspberry Pi MCU DSP Official
    Amazon.com
    20
    $10.99
    1 Channel Relay Shield Module, 10PCS DC 5V Indicator Light LED Module For Arduino R3 MEGA 2560 1280 ARM PIC AVR STM32 Raspberry Pi MCU DSP Official
    Amazon.com
    20
    $11.29
    Hiletgo 12V 8 Channel Relay Module With OPTO-Isolated High And Low Level Trigger 8 Ways Relay Switch Module For Arduino
    Amazon.com
    205
    $11.29
    Hiletgo 12V 8 Channel Relay Module With OPTO-Isolated High And Low Level Trigger 8 Ways Relay Switch Module For Arduino
    Amazon.com
    205
    $20.99
    GUETNEU Relay Board, Relay Module 4 Channel 1 SPDT DIN Rail Mount 24V DC/AC, Interface Board(FY-T734C-D24)
    Amazon.com
    19
    $20.99
    GUETNEU Relay Board, Relay Module 4 Channel 1 SPDT DIN Rail Mount 24V DC/AC, Interface Board(FY-T734C-D24)
    Amazon.com
    19
    $7.19
    $7.99
    EC Buying 2Pcs 24V Relay Module 1-Channel 30A With Optocoupler Isolation Relay Module High And Low Level Trigger
    Amazon.com
    10% off
    $7.19
    $7.99
    EC Buying 2Pcs 24V Relay Module 1-Channel 30A With Optocoupler Isolation Relay Module High And Low Level Trigger
    Amazon.com
    $6.97
    JESSINIE 5V 30A Relay Module, 1 Channel, Optocoupler Isolation, High/Low Trigger For Automation Control
    Amazon.com
    $6.97
    JESSINIE 5V 30A Relay Module, 1 Channel, Optocoupler Isolation, High/Low Trigger For Automation Control
    Amazon.com
    $6.99
    2Pcs DC 5V 1-Channel Relay Module Isolated By SMT Optocoupler High And Low Level Trigger Module Triggered By DC 5V
    Amazon.com
    10
    $6.99
    2Pcs DC 5V 1-Channel Relay Module Isolated By SMT Optocoupler High And Low Level Trigger Module Triggered By DC 5V
    Amazon.com
    10
    $12.45
    $14.39
    RS485 12V 1-Channel Relay Module For PLC Controller Industrial Automation Systems
    Amazon.com
    13% off
    $12.45
    $14.39
    RS485 12V 1-Channel Relay Module For PLC Controller Industrial Automation Systems
    Amazon.com