购买 4 relay module arduino

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Dafurui 5V Relay Module8pack 1 Channel Relay Module 5V Relays Board With Optocoupler Support High/Low Level Trigger For Arduino Relays
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With Optocoupler 4 Channel 4-Channel Relay Modules Relay Control Panel PLC Relay 5V Four Way Module
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4 Channel 5V 12V 24V Relay Module With Optocoupler High Or Low Level Trigger Expansion Red Board For
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5V 12V 24V Relay 1 2 4 Channel SSR Low Level Solid State Relay Module 250V 2A For Arduino
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购买 4 relay module arduino

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$1.33
5V 12V 1 2 4 6 8 Way Relay Module For Arduino 1 2 4 6 8 Channel Relay Module With Optocoupler Relay
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4-Channel 5V Relay Module With Optocoupler, Compatible With Arduino R3, AVR, STM32, PIC, ARM
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5V 1 2 4 8 Channel Relay Module With Optocoupler.Output X Way For Arduino 1CH 2CH 4CH 8CH
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Sunfounder 4 Channel 5V Relay Shield Module For Arduino UNO R3 MEGA 2560 1280 DSP ARM PIC AVR STM32
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Sunfounder 4 Channel 5V Relay Shield Module For Arduino UNO R3 MEGA 2560 1280 DSP ARM PIC AVR STM32
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5V 1 2 4 8 Channel Relay Module With Optocoupler. Relay Output 1 2 4 8 Way Relay Module For Arduino
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3.3V 5V 12V 24V 4 Channel Relay Module High And Low Level Trigger Dual Optocoupler Isolation Relay
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