4 channel relay shield Featured Recommendations:
![PC Accessory: SunFounder 4 Channel 5V Relay Shield Module for Arduino UNO 2560 1280 ARM PIC AVR STM32 - SunFounder]()
PC Accessory: SunFounder 4 Channel 5V Relay Shield Module for Arduino UNO 2560 1280 ARM PIC AVR STM32 - SunFounder
![Car Audio or Theater: SainSmart 4-Channel Relay Module - SainStore Inc.]()
Car Audio or Theater: SainSmart 4-Channel Relay Module - SainStore Inc.
![Car Audio or Theater: SainSmart 8-Channel Relay Module - SainStore Inc.]()
Car Audio or Theater: SainSmart 8-Channel Relay Module - SainStore Inc.
![Car Audio or Theater: SainSmart 16-Channel Relay Module - SainStore Inc.]()
Car Audio or Theater: SainSmart 16-Channel Relay Module - SainStore Inc.
![Car Audio or Theater: SainSmart 8-Channel 5V Solid State Relay Module Board for Arduino Uno Duemilanove MEGA2560 MEGA1280 ARM DSP PIC - SainStore Inc.]()
Car Audio or Theater: SainSmart 8-Channel 5V Solid State Relay Module Board for Arduino Uno Duemilanove MEGA2560 MEGA1280 ARM DSP PIC - SainStore Inc.
![Toy: SainSmart Mega2560 R3 ATmega2560-16AU + 1602LCD + Prototype Shield + 2-Channel 5V Relay Starter Kit with over 16 Basic Arduino Tutorial Projects for Arduino Beginners - Sain Store Inc]()
Toy: SainSmart Mega2560 R3 ATmega2560-16AU + 1602LCD + Prototype Shield + 2-Channel 5V Relay Starter Kit with over 16 Basic Arduino Tutorial Projects for Arduino Beginners - Sain Store Inc
![Wireless: RAVPower PORTABLE CHARGER Element 10400mAh Power Bank CHARGER External Battery CHARGER Pack (Dual USB Outputs, Ultra Compact Design), for iPhone 5, 5S, 5C, 4S, 4, iPad Air, 4, 3, 2, Mini 2 (Apple adapters not included); Samsung Galaxy S4, S3, S2, Note 3, Note 2; HTC One, EVO, Thunderbolt, Incredible, Droid DNA, Motorola ATRIX, Droid, Moto X, Google Glass, Nexus 4, Nexus 5, Nexus 7, Nexus 10, LG Optimus, PS Vita, GoPro, Smart Watch and More - Black - RAVPower]()
Wireless: RAVPower PORTABLE CHARGER Element 10400mAh Power Bank CHARGER External Battery CHARGER Pack (Dual USB Outputs, Ultra Compact Design), for iPhone 5, 5S, 5C, 4S, 4, iPad Air, 4, 3, 2, Mini 2 (Apple adapters not included); Samsung Galaxy S4, S3, S2, Note 3, Note 2; HTC One, EVO, Thunderbolt, Incredible, Droid DNA, Motorola ATRIX, Droid, Moto X, Google Glass, Nexus 4, Nexus 5, Nexus 7, Nexus 10, LG Optimus, PS Vita, GoPro, Smart Watch and More - Black - RAVPower
![Home Improvement: Generic Easy Provider 5v 4-channel Relay Module Shield for Arduino ARM PIC AVR DSP Electronic - Easy Provider]()
Home Improvement: Generic Easy Provider 5v 4-channel Relay Module Shield for Arduino ARM PIC AVR DSP Electronic - Easy Provider
![Speakers: DODOCOOL 5V Active Low 4 Channel Relay Module Board for Arduino PIC AVR MCU DSP ARM - DODOCOOL]()
Speakers: DODOCOOL 5V Active Low 4 Channel Relay Module Board for Arduino PIC AVR MCU DSP ARM - DODOCOOL
![Automotive Parts and Accessories: RioRand 12V 4 Channel Relay Shield Module Expansion board For Arduino ARM PIC AVR DSP - RioRand]()
Automotive Parts and Accessories: RioRand 12V 4 Channel Relay Shield Module Expansion board For Arduino ARM PIC AVR DSP - RioRand
![BISS: SainSmart 2 channel Signal Relay for Arduino UNO R3 MEGA2560 MEGA1280 - Sain Store]()
BISS: SainSmart 2 channel Signal Relay for Arduino UNO R3 MEGA2560 MEGA1280 - Sain Store
![BISS: SainSmart 4 channel Signal Relay for Arduino UNO R3 MEGA2560 MEGA1280 - Sain Store]()
BISS: SainSmart 4 channel Signal Relay for Arduino UNO R3 MEGA2560 MEGA1280 - Sain Store
![Toy: Generic 5V Two 2 Channel Relay Module Shield XBee / BTBee Board For Arduino DIY - SoaringE]()
Toy: Generic 5V Two 2 Channel Relay Module Shield XBee / BTBee Board For Arduino DIY - SoaringE
![CE: Generic 4 Channel 24V Relay Shield Module Extension Board Adapter for Arduino - SoaringE]()
CE: Generic 4 Channel 24V Relay Shield Module Extension Board Adapter for Arduino - SoaringE
![Network Media Player: Jagu-4-Channel Relay Shield Module for Arduino - Red + Blue - ELCE Stock]()
Network Media Player: Jagu-4-Channel Relay Shield Module for Arduino - Red + Blue - ELCE Stock
![Car Audio or Theater: SainSmart 2-Channel Relay Module - SainStore Inc.]()
Car Audio or Theater: SainSmart 2-Channel Relay Module - SainStore Inc.
![Home Improvement: Blue SRD-05VDC-SL-C 4 Channel Coil DC 5V Relay Module Shield - Amico]()
Home Improvement: Blue SRD-05VDC-SL-C 4 Channel Coil DC 5V Relay Module Shield - Amico
![Wireless: RAVPower Element 10400mAh External Battery Pack Charger Power Bank (Dual USB Outputs, Ultra Compact Design), for iPhone 5S, 5C, 5, 4S, 4, iPad Air, 4, 3, 2, Mini 2 (Apple adapters not included); Samsung Galaxy S4, S3, S2, Note 3, Note 2; HTC One, EVO, Thunderbolt, Incredible, Droid DNA, Motorola ATRIX, Droid, Moto X, Google Glass, Nexus 4, Nexus 7, Nexus 10, LG Optimus, PS Vita, GoPro, Smart Watch and More - RAVPower]()
Wireless: RAVPower Element 10400mAh External Battery Pack Charger Power Bank (Dual USB Outputs, Ultra Compact Design), for iPhone 5S, 5C, 5, 4S, 4, iPad Air, 4, 3, 2, Mini 2 (Apple adapters not included); Samsung Galaxy S4, S3, S2, Note 3, Note 2; HTC One, EVO, Thunderbolt, Incredible, Droid DNA, Motorola ATRIX, Droid, Moto X, Google Glass, Nexus 4, Nexus 7, Nexus 10, LG Optimus, PS Vita, GoPro, Smart Watch and More - RAVPower
![BISS: 5 pcs 4 Channel 12V Relay Module Shield Expansion Board For Arduino Optical Isolation - topseller2013888]()
BISS: 5 pcs 4 Channel 12V Relay Module Shield Expansion Board For Arduino Optical Isolation - topseller2013888
![Home Improvement: DC 5V 4-Pin 2-Channel Relay Module Borad for 51 AVR ARM Electronic - Amico]()
Home Improvement: DC 5V 4-Pin 2-Channel Relay Module Borad for 51 AVR ARM Electronic - Amico
The above is "4 Channel Relay Shield, PC Accessory: Sunfounder 4 Channel 5V Relay Shield Module For Arduino UNO 2560 1..." recommended related products, Please click on the picture to see product details and 4 channel relay shield reviews!