Hw 131 Power Supply Datasheet Jun 2026

The is a specialized, compact voltage regulator designed to fit directly onto an MB102 breadboard . It serves as a reliable interface for powering electronic prototypes, offering both 3.3V and 5V outputs simultaneously from a single DC input. Technical Specifications

The USB Type-A port can be used to power external devices that require a regulated 5V source.

Note: Exceeding these values may cause permanent damage. Hw 131 Power Supply Datasheet

6.5V to 12V DC (via 5.5mm x 2.1mm barrel jack) or 5V (via USB port).

The Hw 131 uses linear regulators (not switching). This means wasted power = (VIN – VOUT) × ILOAD. At VIN=12V, ILOAD(5V)=500mA, dissipation = (12-5)×0.5 = 3.5W – the board will become hot (>70°C). The is a specialized, compact voltage regulator designed

Connect a 9V wall adapter to barrel jack. Place module on breadboard. Use jumper to set “EXT”. The breadboard’s red line = 5V, blue line = 3.3V.

The jumpers allow you to set the left and right breadboard rails to different voltages (e.g., 5V on one side, 3.3V on the other) or turn a rail off entirely. Note: Exceeding these values may cause permanent damage

However, the modern "Yellow" HW-131 modules typically utilize a specific switching regulator configuration or linear regulators depending on the revision.

The HW-131 is a common, low-cost switching power supply module (typically 24V or 12V output, often used with CNC, 3D printers, and LED systems).