Great Product
Super easy to use, very accurate. I used it to be able to run ferry lights off a AC Adapter used normally to charge cell phones and not a battery pack.
Mitchell Terblanche
DFRobot
20W Adjustable DC-DC Buck Converter with Digital Display
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A 20W adjustable DC-DC buck converter module based on the LM2596 step-down regulator, featuring a built-in digital display that shows the output voltage in r...
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A 20W adjustable DC-DC buck converter module based on the LM2596 step-down regulator, featuring a built-in digital display that shows the output voltage in real time. Adjust the output from 1.25V to 37V using the onboard potentiometer — no multimeter needed. Wire terminals mean no soldering is required.
The module supports self-calibration for high-precision voltage output, and the display can toggle between input and output voltage readings or be turned off entirely. Ideal for creating adjustable power supplies, stepping down vehicle power, or powering electronics from higher-voltage sources.
Key Features
- Built-in Digital Display – Real-time voltage readout, switchable between input and output
- Adjustable Output – 1.25V to 37V via onboard potentiometer
- Self-Calibration – One-time calibration stored automatically
- Wire Terminals – Screw terminals, no soldering needed
- Protection Circuitry – Reverse polarity, overheating, and short-circuit protection
- 88% Average Efficiency
Specifications
- Input Voltage: 4.0–40V DC
- Output Voltage: 1.25–37V (input must be ≥1.5V higher than output)
- Output Current: 3A max (recommended ≤2A without heatsink)
- Output Power: 20W (heatsink recommended above 15W)
- Voltage Accuracy: ±0.05V
- Regulator IC: LM2596
- Dimensions: 66 × 36 × 12mm
- Mounting Dimensions: 61 × 31mm
- Weight: 22g
Ideal For
- DIY adjustable bench power supplies
- 12V to 5V or 3.3V step-down for electronics
- 24V vehicle power to USB/device voltage
- Solar panel voltage regulation
- Battery-powered projects requiring specific voltages
Package Contents
- 1× 20W Adjustable DC-DC Buck Converter with Digital Display
Jargon buster
Plain-language definitions for the technical terms used above.
- Buck converter
- A power circuit that reduces a higher DC voltage to a lower DC voltage. It is useful when your supply voltage is too high for a module or microcontroller and you want less heat and better efficiency than a simple linear regulator.
- DC
- DC means direct current, where electricity flows in one constant direction, as supplied by batteries, USB ports and many plug-pack power supplies. When a product specifies DC, it runs from a DC supply rather than mains AC, so you need to provide the correct voltage and polarity.
- potentiometer
- A variable resistor usually turned with a knob or shaft to create an adjustable electrical signal. It is often used for inputs such as volume, brightness or position, so it helps beginners learn how a microcontroller reads changing values.
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