The 16-Channel 5V Relay Module is designed for high-load switching projects where reliability is non-negotiable. With 16 individual relay channels, you can control lights, pumps, motors, and solenoids simultaneously. The onboard LM2576 Buck Regulator is a standout featureit efficiently manages the power supply to the relay coils, preventing the voltage drops commonly seen in cheaper relay boards that rely on standard linear regulators.
Optocoupler Isolation: Provides complete electrical separation between your sensitive microcontroller (Arduino/ESP32) and the high-power relay side, protecting your board from back-EMF spikes.
LM2576 Regulator: Ensures the relay coils receive a constant, stable voltage, preventing chattering or failure during high-load switching.
High-Current Handling: Each relay is rated for heavy-duty switching (up to 10A at 250V AC).
Flexible Logic: Supports high or low-level trigger, making it compatible with almost any microcontroller architecture.
Visual Status: 16 independent indicator LEDs provide real-time feedback on which relays are active.
| Feature | Specification |
| Relay Channels | 16 |
| Control Voltage | 5V DC |
| Regulator Chip | LM2576 (High-Efficiency Switching) |
| Isolation | Optocoupler (PC817 or similar) |
| Max Load | 10A @ 250V AC / 10A @ 30V DC |
| Trigger Logic | High / Low Level Selectable |
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