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Duotone panel — violet briefing on the left, lime-sealed detail sheet on the right.
5V Dual Channel Relay Module with Optocoupler Desoldering Pump which enables autonomous operation with which enables autonomous operation with automatic charging when USB power is connected If using automotive power Dual Independent Channels: Control two separate appliances Optocoupler Isolation: Built in optical isolation between the microcontroller signal side and the relay coil side prevents voltage spikes and back EMF from damaging your development board
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