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  1. Showing 1 - 36 out of 168 results for "arduino relay board serial communication"
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      Relay Module With Optocoupler High/Low Level Trigger For Arduino (5, 5V Relay 6 Channel)
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      Relay Module With Optocoupler Hig…
      $41.95
      W
      www.fruugo.us
      delivery truckFree shipping
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      4Pcs 5V 2 Channel Relay Module With Optocoupler Low Level Trigger Expansion Board Compatible With Arduino R3, Diy Electronics,Electronic Components
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      4Pcs 5V 2 Channel Relay Module …
      $28.99
      T
      Temu US
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      DC 5V 12V 24V 8 Channel Relay Module Board With Optocoupler High Low Level Trigger For Automation Projects
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      DC 5V 12V 24V 8 Channel Relay M…
      $64.00
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      www.fruugo.us
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      DC Relay Board Module Shield 5V 12V 24V 1 2 4 6 8 Channel With Optocoupler High Low Level Trigger Compatibility
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      DC Relay Board Module Shield 5V …
      $26.95
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      www.fruugo.us
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      Velleman Protoshield Prototyping Board With Mini Breadboard For Arduino By Whadda
      Velleman Protoshield Prototyping B…
      J
      Jameco Electronics
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      Arduino Mega, Microcontroller, Atmega328p R3 Sensor Module Kit, Acrylic Case, Hacking Tech Gadgets, Multi-Interface Development Board Compatible
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      1
      Arduino Mega, Microcontroller, Atm…
      T
      Temu US
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      Relay Module 4 Way 4 Channel 5V …
      A
      Amazon.com
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      5V Two 2 Channel Relay Module Wi…
      $115.96
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      warehousesoverstock
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      8-Channel Relay Module Board Shi…
      A
      Alibaba.com
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      FCGK 1 Channel Solid State Relay …
      A
      Alibaba B2B
      delivery truckFree shipping
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      KY-019 5V 12V Single Channel Rel…
      A
      Alibaba B2B
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      Sainsmart MEGA2560 R3+2-Chann…
      Cnlansi
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      1 Channel 5V / 12V Relay Module B…
      $4.72
      A
      AliExpress
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      EC Buying 2Pcs XL9535-K1V5 Rela…
      A
      Amazon.com
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      2 Channel Relay Module, 5 V Relay …
      E
      Everymarket INC
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      Relay Module 1 Channel 5V 12V 24…
      $1.52
      A
      AliExpress
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      4Channel Relay Module Control Bo…
      $58.92
      W
      warehousesoverstock
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      Nano V3.0 Type-C Development Bo…
      $22.95
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      www.fruugo.us
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      8 Channel 5V Relay Module Shield …
      $83.90
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      warehousesoverstock
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      Channel AC 220V Optocoupler Isola…
      $25.95
      W
      www.fruugo.us
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      One 1 Channel 5V 12V Relay Modul…
      A
      AliExpress
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      Sainsmart 8 Channel DC 5V Relay …
      Cnlansi
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      1 Channel 5V 12V Relay Module Bo…
      $4.40
      A
      AliExpress
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      5V 8 Channel Solid State Relay Boa…
      E
      eBay.com
      delivery truckFree shipping
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      8 Channel Relay Module For Arduin…
      E
      Everymarket INC
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      5V Relay 8 Channel Shield Module …
      Walmart
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      Sainsmart Leonardo R3+2-Channel …
      Cnlansi
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      Dealikee 5 Pack 5 V Relay Module …
      E
      Everymarket INC
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      16-Channel 5V Relay Module With …
      E
      eBay
      delivery truckFree shipping
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      5V 1-Channel Relay Board Module …
      E
      eBay.com
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      Sainsmart UNO + 2-Channel Relay …
      Cnlansi
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      5V 8-Channel Relay Board Module …
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      eBay.com
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      Sainsmart 4-Channel 5V Relay Mod…
      Cnlansi
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      5V 2-Channel Relay Board Module …
      E
      eBay.com
      delivery truckFree shipping
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      5V/12V/24V High Low Levels Trigge…
      Walmart
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      Az Delivery 2 Channel Relay Modul…
      E
      Everymarket INC
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