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Amazon.com: HiLetgo 2pcs 5V One Channel Relay Module Relay Switch with OPTO Isolation High Low Level Trigger : Industrial & Scientific
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Amazon.com: SMAKN DC 5V High Level Trigger Switch Latching Relay Module / 10A load can be controlled : Industrial & Scientific
Amazon.com: 5V Relay Module with Optocoupler Isolation Support High and Low Level Trigger Relay Red Board (8 Channel 5V Relay) : Industrial & Scientific
NOYITO 5V 2-Channel Relay Module High Low Level Trigger with Optocoupler Isolation Relay Load AC 0-250V 10A DC 0-30V 10A Circuit Switch Board: Amazon.com: Industrial & Scientific
NE555 Trigger Timer Switch Delay Connect Module Adjustable Time Delay Relay Module DC 5V 10A 0-10S with LED Indicator Board: Amazon.com: Industrial & Scientific
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