DFRobot - 20W Adjustable DC-DC Buck Converter with Digital Display

This 20W adjustable DC-DC buck converter makes setting a project supply easier with an onboard voltage display, a screw potentiometer and solder-free wire terminals. Adjust the output to match the load, then read the voltage directly on the board instead of repeatedly connecting a multimeter for routine adjustment. Based on the LM2596 step-down regulator, this module accepts 4.0 ~ 40V DC input and offers continuously adjustable 1.25V ~ 37V output within the required input headroom. The compact module suits DIY adjustable supplies and common DC conversion tasks, with clear current, power and cooling limits for load selection.

Built-In Display for Input or Output Voltage

This adjustable buck converter puts voltage monitoring directly on the board, helping check the supply while tuning a project. Press the button to switch between input and output readings; an indicator identifies which voltage is being displayed. This arrangement keeps the selected reading visible during setup without an extra meter connection for each adjustment. When the display is unnecessary, hold the button for 2 seconds and release to turn the display off.

Continuously Adjustable Output with Simple Screw Control

This step-down module covers an adjustable output range of 1.25V ~ 37V, allowing one module to serve projects with different DC supply requirements. Turn the upper blue potentiometer screw clockwise to increase output voltage or counterclockwise to decrease output voltage. Typical conversions include 12V to 3.3V or 5V, 24V to 5V or 12V, and 36V to 24V. The input must remain at least 1.5V above the selected output.

Wire Terminals for Solder-Free Integration

This buck converter uses wire terminals, making input and output connections possible without soldering. The 6.6 * 3.6 *1.2cm board includes mounting provisions for integration into a project enclosure or adjustable supply build. Reverse-connection and short-circuit protection add practical protection features, while the stated average conversion efficiency is 88%. Select the load within both the 20W power limit and the 3A maximum current limit, and provide cooling where required.

• LM2596-based adjustable DC-DC step-down conversion
• Digital display with button-selectable input or output voltage readings
• Display can be turned off by holding the button for 2 seconds and releasing
• Continuously adjustable 1.25V ~ 37V output using the screw potentiometer
• Wire terminals for solder-free connections
• 20W output power and 3A maximum output current, subject to operating and cooling limits
• 88% stated average conversion efficiency
• Reverse-connection protection and short-circuit protection

• DIY adjustable DC power supplies
• Battery-powered DC step-down projects
• 12V to 3.3V or 5V conversion
• 24V to 5V or 12V conversion
• 36V to 24V conversion
• DC supply conversion for industrial equipment

• Input Voltage: 4.0 ~ 40V
• Output Voltage: 1.25V ~ 37V
• Output Power: 20W
• Output Current: 3A
• Mounting Dimensions: 6.1 * 3.1cm/ 2.4 * 1.22 inches (L x W)
• Dimension: 6.6 * 3.6 *1.2cm/2.59 * 1.42 * 0.47 inches
• Weight: 22g

• 20W Adjustable DC-DC Buck Converter with Digital Display x1