The HW-132 USB Step Up/Down Power Supply Module is a versatile and compact "pocket" power supply designed for engineers, students, and hobbyists. At Electrapac, we recommend this as an essential tool for your workbench, allowing you to power almost any low-voltage project directly from a USB port.

Product Overview

The HW-132 is a unique Buck-Boost converter, meaning it can take a standard $5\text{V}$ USB input and either "step up" (boost) or "step down" (buck) the voltage to any value between 1.2V and 24V. It features a high-precision multi-turn potentiometer for fine voltage adjustments and a clear 3-digit LED display to monitor your output in real-time.

Key Features for Electrapac Customers

• USB Plug-and-Play: Power your projects from a laptop, power bank, or phone charger. No bulky external power adapters are required.

• Fine-Tuned Control: The multi-turn potentiometer allows you to dial in exact voltages (e.g., $3.3\text{V}$ for an ESP32 or $12\text{V}$ for a cooling fan) with high precision.

• Output Toggle Button: Includes a physical button to enable or disable the output power without unplugging the USB, preventing accidental shorts while wiring.

• Calibration Mode: If the display is slightly off, the board features a calibration routine to ensure the voltage shown matches your multimeter.

• Dual Input Options: Use the standard USB-A male plug or the integrated solder pads for a more permanent installation.

How to Use Your HW-132

To get started with your Electrapac power module:

1. Connect Power: Plug the module into a $5\text{V}$ USB port. The display will light up.

2. Adjust Voltage: Turn the potentiometer screw clockwise to increase voltage and counter-clockwise to decrease it. Always check the display before connecting your device.

3. Connect Load: Insert your project wires into the screw terminals at the end of the module and tighten them.

4. Activate: Press the "ON/OFF" button to send power to your project. A small indicator LED usually lights up when the output is active.

Primary Applications

• Prototyping: Providing the exact voltage needed for sensors, microcontrollers, and logic gates on a breadboard.

• Testing Components: Safely testing LEDs (with the right voltage), small DC motors, and relays.

• Repair Tool: Powering up device boards for troubleshooting when the original power supply is missing.

• Fan Speed Controller: Stepping up $5\text{V}$ to $12\text{V}$ or $24\text{V}$ to run PC cooling fans at full speed.

• Battery Charging: Charging small niche batteries that require non-standard voltages.

Why Shop at Electrapac?

We source the HW-132 (Step Up/Down) with high-quality filter capacitors to ensure low ripple and stable voltage delivery. At www.electrapac.com, we provide the tools that turn any USB port into a mini-laboratory power station.