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The single-channel relay module is much more than just a plain relay, it contains components that make switching and connection easier and act as indicators to show if the module is powered and if the relay is active.
AEDIKO 4pcs DC 12V Relay Module 1 Channel Relay Board with Optocoupler Isolation Support High or Low Level: : Industrial & Scientific
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5V Single-Channel Relay Module - Pin Diagram, Specifications, Applications, Working
The module uses genuine quality relay, normally open interfaces Maximum load: AC 250V/10A, DC 30V/10A SMD optocoupler isolation, strong driving
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Implement this 4 Channel Relay module to power your progressive linear actuator. Use an Arduino microcontroller for even more control options.
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【Control Devices】The 2-channel relay module uses genuine high quality DC5V relay and SMD opto-isolator supporting high/low level trigger, widely apply
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Equiped with high-current relay, AC250V 10A ; DC30V 10A 5V 4-Channel Relay interface board, and each one needs 50-60mA Driver Current Be able to
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