购买 4 relay module arduino connection

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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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1 2 4 6 8 Channel Way 5V 12V 24V Relay Module Board Shield With Optocoupler Support High And Low
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2 4 Channel DC 5V 12V Relay Module With Optocoupler Low Level Trigger 1 Way Expansion Board For
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5V Relay 1 2 4 8 Channel SSR High Low Level Solid State Relay Module 250V 2A For Arduino
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1 2 4 8 Channel 5V 12V Relay Module Board Shield With Optocoupler Support High And Low Level Trigger
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Relay Module 1 2 4 6 8 Channel 5V 12V 24V Relay Module Board With Optocoupler Support High And Low
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Relay Module 1 2 4 6 8 Channel 5V 12V 24V Relay Module Board With Optocoupler Support High And Low
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DIYTZT 1 2 4 6 8 Channel 5V 12V Relay Module Board Shield With Optocoupler Support High And Low
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购买 4 relay module arduino connection

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$3.25
1PCS 1/2/4 Channel 3V Relay Module Board Low Level Trigger Relay Output Relay Module With LED
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4 Channel 5V Relay Shield Module, Four Way Relay Control Board Relay Expansion Board For Arduino UNO
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12V Relay 1 2 4 8 Channel SSR High Low Level Solid State Relay Module 250V 2A For Arduino 5V Relay
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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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