The HW-411a LM2596 Module is a high-efficiency switching regulator (Buck Converter) that converts a higher input voltage into a lower, stable output voltage. Unlike traditional linear regulators (like the L7805) that waste excess energy as heat, the LM2596 is a switching regulator, meaning it stays cool and keeps your batteries lasting longer. Its a must-have for any project involving different voltage requirements, such as powering 5V sensors from a 12V or 24V source.
High Efficiency: Up to 92% conversion efficiency, reducing heat and power loss.
Precision Control: Multi-turn (25-turn) potentiometer allows for ultra-precise voltage adjustment down to 0.1V increments.
Compact & Powerful: Small footprint but capable of handling up to 3.0 Amps (with a heatsink).
Wide Range: Supports a broad input range (up to 40V), making it compatible with lead-acid batteries, LiPo packs, and laptop power bricks.
Safety First: Built-in thermal shutdown and current-limit protection.
| Feature | Specification |
| Model | HW-411a / LM2596S |
| Input Voltage | 4.5V to 40V DC |
| Output Voltage | 1.25V to 35V DC (Adjustable) |
| Output Current | 2A (Continuous), 3A (Peak with Heatsink) |
| Switching Frequency | 150 kHz |
| Output Ripple | < 30mV |
| Load Regulation | 0.5% |
| Dimensions | 43mm x 21mm x 14mm |
Powering SIM800L: Steps down 5V/12V to the 4.0V required for stable GSM operation.
Battery-Powered Projects: Efficiently uses 18650 cells to power 3.3V or 5V microcontrollers.
LED Drivers: Adjusting voltage for high-power LED strips.
Robotics: Stepping down a 3S or 4S LiPo battery to power servos and sensors.
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