CNC USB Buck-Boost Power Supply Module 15W LCD Voltmeter PWM

XY-UDTA CNC USB Voltage Step Up/Down Power Supply Module — 1.44" LCD, 15W, Voltmeter, Ammeter, Coulometer & PWM Generator

Take full control of your DC power needs with the XY-UDTA CNC USB Buck-Boost Power Supply Module. Featuring a vivid 1.44-inch full-color HD LCD display with a 160° wide viewing angle, this compact yet powerful module integrates three essential systems — a precision power supply (PER), a measurement/coulometer system (VAH), and a PWM signal generator — all in one easy-to-use unit. Whether you're charging batteries, testing circuits, or driving motor controllers, this module delivers high accuracy and versatility for hobbyists, engineers, and electronics enthusiasts alike.

Key Features

• Vivid 1.44" HD Color LCD — 160° wide viewing angle, high brightness, long working life, and a customizable theme color interface for clear, intuitive readouts at any angle.
• High-Precision Buck-Boost Power Supply — Supports both constant voltage (CV) and constant current (CC) modes. Input: DC 3.5–15V; Output: DC 0.6–30V, up to 2A / 15W.
• Three Integrated Systems — Power supply (PER), voltmeter/ammeter/coulometer (VAH), and PWM signal generator — all accessible from a single module.
• Built-In Protections — Over-voltage, over-current, over-power, over-temperature, and under-voltage protection keep your projects and devices safe.
• Temperature Measurement — Built-in sensor for monitoring operating temperature in real time.
• High-Resolution Measurements — Voltage resolution: 0.01V (±0.3% accuracy); Current resolution: 0.001A (±0.5% accuracy).
• PWM Signal Generator — Generates adjustable square wave and pulse signals for motor control, dimming, servo/stepper motor driving, solenoid valve control, and experimental development.
• Coulometer Function — Tracks capacity (0–999,999 Ah), energy (0–999,999 Wh), and elapsed time (0–1,000 hours) — ideal for battery charge/discharge analysis.

Technical Specifications

System Applications

Power Supply System (PER)

• Use as a versatile step-up/step-down power supply with full CV/CC control and multi-layer protection.
• Charge small rechargeable batteries (0.6V–30V, within 15W) including lithium cells, lead-acid packs, and more.
• Charging Steps:
  1. Determine your battery's float charge voltage and current (e.g., 4.2V for a 3.7V lithium cell, ~14V for a 12V lead-acid battery).
  2. Set output voltage under no-load conditions to match the float charge voltage.
  3. Set the constant current limit to your desired charging current, keeping within the 15W power budget.
  4. Connect your battery and begin charging.

Measurement System (VAH)

• Functions like a multimeter — measures forward voltage, current, power, capacity, energy, and elapsed time.
• Ideal for high-precision coulometry and battery charge/discharge logging.

PWM Signal Generator (PWM)

• Generates adjustable square wave and pulse signals for electronics development and debugging.
• Compatible with DC motor drivers, stepper motor controllers, servo motors, electric clamps, and solenoid valves.
• Can replace PLC pulse outputs in many automation scenarios.
• Note: The PWM output is a signal only and cannot directly drive high-power loads such as motors or lamps.

Package Includes

• 1× XY-UDTA CNC USB Voltage Step Up/Down Power Supply Module

Made in Mainland China.

Note: Due to lighting and screen variations, the product color may appear slightly different from images. Please allow 1–3 cm measurement tolerances due to manual measurement.

For more on electrical safety standards for low-voltage equipment, visit the U.S. Consumer Product Safety Commission — Electrical Safety.

Frequently Asked Questions

Q: What is the difference between the buck (step-down) and boost (step-up) modes on this power supply module?

A: The XY-UDTA CNC USB module automatically operates in either buck (step-down) mode or boost (step-up) mode depending on your input and desired output voltage. If your input voltage (DC 3.5–15V) is higher than the target output, it steps down; if lower, it steps up — outputting DC 0.6V to 30V seamlessly. This makes it extremely flexible for powering a wide range of DC devices from a single USB or DC source.

Q: Can I use this module to charge lithium batteries safely?

A: Yes. The module's constant current / constant voltage (CC/CV) function makes it suitable for charging small rechargeable batteries within the 0.6V–30V, 15W range. Simply set the output voltage to match your battery's float charge voltage, set the current limit, then connect the battery. Built-in over-voltage, over-current, and over-temperature protections add an extra layer of safety during charging.

Q: What can I control or test with the PWM generator function?

A: The integrated PWM signal generator produces adjustable square wave and pulse signals that can be used to control DC motors, stepper motors, servo motors, solenoid valves, LED dimming circuits, and more. It is designed as a signal output for driving compatible motor drivers or controllers — it does not directly power high-current loads. It is a useful tool for electronics prototyping, robotics, and automation development.

Q: How accurate are the voltage and current readings on the LCD display?

A: The module offers high-precision readings with a voltage accuracy of ±0.3% + 1 digit (0.01V resolution) and a current accuracy of ±0.5% + 1 digit (0.001A resolution). These specifications make it reliable for most hobbyist, laboratory, and engineering measurement needs, including battery capacity tracking and coulometry.