One module, any voltage! The LM2596 DC-DC step down (buck) converter turns a wide 4.5V–40V input into a stable, adjustable 1.25V–37V output at up to 92% efficiency — far cooler and more efficient than a linear regulator. Just turn the onboard potentiometer to dial in the exact voltage your project needs. A must-have for battery-powered builds and any Arduino project running off 12V or 24V supplies.

Key Features

• Wide input voltage: 4.5V – 40V DC
• Adjustable output voltage: 1.25V – 37V DC via onboard potentiometer
• High conversion efficiency: up to 92% (stays cool, saves battery)
• Genuine LM2596 step-down switching IC
• Built-in overheat and overcurrent protection
• Stable regulated output under varying load
• Compact module with screw terminals (IN+, IN-, OUT+, OUT-)
• Easy to use — set voltage once with a multimeter, then connect your load

How to Use (Usage)

1. Connect your power source (4.5V–40V DC) to IN+ and IN-.
2. With a multimeter on OUT+ / OUT-, turn the onboard blue potentiometer until the output reads the voltage you need (e.g. 5V).
3. Disconnect input, connect your load to OUT+ / OUT-, then power up.

Important: always set the output voltage BEFORE connecting sensitive electronics like microcontrollers. Input voltage must stay above the desired output. For sustained high current, add a small heatsink. Browse more power options in the Power Supply & Adapters category under Shop.

Applications

• Powering Arduino boards from 12V/24V batteries or adapters
• Raspberry Pi projects needing stable 5V from higher voltages
• LED lighting and LED strips with custom voltage
• DC motor drivers and CNC / robotics builds — see our Robotics parts
• Battery-powered DIY electronics projects
• Replacing hot, wasteful linear regulators — explore Modules

Frequently Asked Questions

Q: How do I set the output voltage?
A: Connect the input power, put a multimeter across OUT+ and OUT-, and turn the onboard blue potentiometer until you read the voltage you want. Then connect your load.

Q: How much current can it supply?
A: The LM2596 chip is rated up to 3A; the module comfortably handles around 2A continuous — add a small heatsink if you run it near the top end for long periods.

Q: Can I power my Arduino from a 12V battery with this?
A: Yes — set the output to 5V and you can run your Arduino, sensors and small modules straight from a 12V battery or adapter.

Q: Why choose a buck converter over a 7805 regulator?
A: A buck converter switches efficiently (up to 92%) instead of burning excess voltage as heat, so your batteries last much longer and nothing gets hot.

Q: Will the output stay stable if the input changes?
A: Yes — the output stays regulated as long as the input remains above your set output voltage.

Q: Where can I buy an LM2596 module in Pakistan?
A: Right here — QKZee Technologies stocks it at our Hall Road, Lahore shop with Cash on Delivery across Pakistan.