0.56' DC-DC 4-40V to 1.25-37V 3A

A compact, display-equipped step-down converter that gives you adjustable 1.25–37 V output from any 4–40 V DC source — with a 0.56-inch LED voltmeter for instant input/output monitoring. With 2 A output current, onboard short-circuit protection, and reverse-polarity protection, this is an ideal power module for embedded projects and compact bench setups that need reliable, visible voltage regulation.

🔹 Key Applications

• Compact bench power supply with visible voltage readout
• Arduino and ESP32 power regulation from 12 V or 24 V sources
• Drone and RC vehicle onboard power regulation
• IoT node power supply with voltage monitoring
• Sensor module power rails in industrial enclosures

🔹 Why Choose This Module?

• 0.56-inch LED voltmeter built in — toggle input/output reading with one switch
• Reverse polarity protection — protects against accidental wrong-way wiring
• Built-in short-circuit protection — prevents module and load damage
• Wide voltage range (4–40 V input) — works with virtually any DC source
• Terminal block connections — no soldering required for quick deployment

🔹 Technical Specifications

• Input Voltage: 4 V – 40 V DC
• Output Voltage: 1.25 V – 37 V DC (continuously adjustable)
• Output Current: 2 A
• Display: 0.56-inch LED voltmeter (±0.1 V)
• Voltmeter Range: 0 V – 40 V
• Protection: Reverse polarity, short-circuit

🔹 What's Included

1 × DC-DC Step-Down Module with 0.56" LED Voltmeter Display

🔹 Pro Tip

💡 Green LED = output voltage displayed. Red LED = input voltage displayed. Use this module to power ESP32 or Arduino Nano directly from a 12 V LiPo — set output to 5 V for USB-equivalent power delivery. Terminal blocks make wiring clean and modular.

⚠️ Note: Always ensure proper heat dissipation and correct voltage configuration before powering connected devices.