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1 Channel Relay Module Interface Board Shield for Arduino 5V Low Level Trigger One PIC AVR DSP ARM MCU DC AC 220V: Amazon.com: Industrial & Scientific
DC 5V 12V 24V Digital LED Display Infinite Cycle Delay Timer Switch ON/OFF Relay Module (DC 12V) - - Amazon.com
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5V 12V 24V 1-Channel Relay Module Shield (5V): Amazon.com: Industrial & Scientific
