A 12V Dual-Channel Relay Module incorporates two independently controlled electromagnetic relays onto a single printed circuit board (PCB). Operating natively on a 12V DC power rail, it allows low-power microcontrollers or 12V sensors to switch up to two separate high-voltage AC or DC loads simultaneously. It is the premier hardware choice across India for automotive modifications (like controlling dual horns or fog lights), 12V off-grid solar power distribution, backup battery bank switching, and reverse-forward DC motor control.
✨ Key Features
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- Dual Optocoupler Galvanic Isolation: Packed with two built-in PC817 optocoupler chips that isolate the incoming digital logic from the high-voltage side using light, completely protecting your microcontroller from back-EMF spikes.
- 12V Native Rail Efficiency: Engineered to operate directly off standard 12V car batteries, lead-acid cells, or 12V SMPS units without requiring additional step-down buck converters to power the coils.
- Flexible Trigger Logic Selection: Most versions feature an onboard high/low jumper or transistor array allowing each channel to be independently tripped by either a High Logic Signal (3.3V to 12V) or a Low Logic Signal (0V).
- Onboard Visual Diagnostics: Equipped with three surface-mount LEDs; one to confirm steady Board Power (Red) and two individual indicators to show exactly when Channel 1 (IN1) or Channel 2 (IN2) is actively clicked closed.
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