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Small green circuit board with adjustable voltage regulator components

SMUGDESK

SMUGDESK LM337 XR-103 Adjustable Power Supply Module

SKU CH-5QMR-7PG35

Compact XR-103 module delivers positive and negative adjustable voltage using an LM337 regulator for experiments and DIY circuits

  • Positive and negative adjustable voltage output with LM337 core chip
  • Compact XR-103 module installs easily in experimental equipment and DIY devices
  • Precise voltage adjustment provides stable linear power for circuit debugging
  • Low ripple suppression reduces power supply noise during operation
  • Suited for electronic experiments, DIY projects and small circuit maintenance

LM337 dual-polarity regulator

The SMUGDESK XR-103 module uses an LM337 core chip to deliver both positive and negative adjustable regulated voltage from a single compact board. Linear regulation keeps output clean with low ripple, making it suitable for sensitive analog circuits and bench experiments. The small footprint allows direct embedding inside test fixtures or DIY enclosures. It is aimed at hobbyists, students and technicians who need a simple bipolar supply for circuit debugging.

For analog prototyping, not high-current loads

This board suits experimenters building op-amp circuits, sensor interfaces or audio stages that require matched positive and negative rails. Builders needing high output current, switching efficiency or fixed-voltage rails should look at alternative power solutions. The module is not designed for mains-powered equipment or automotive electrical systems. Users must verify their own input voltage limits and avoid overloading the regulator.

Bare board for custom integration

No enclosure, connectors, heatsink or mounting hardware are included with the XR-103. The bare PCB expects the builder to solder input, output and adjustment pins directly to their project wiring or terminal blocks. This keeps the module inexpensive and flexible for breadboard, perfboard or chassis-mount use. Documentation is limited to the wiring warnings printed on the silkscreen.

Highlights

  • Positive and negative adjustable voltage output with LM337 core chip
  • Compact XR-103 module installs easily in experimental equipment and DIY devices
  • Precise voltage adjustment provides stable linear power for circuit debugging
  • Low ripple suppression reduces power supply noise during operation
  • Suited for electronic experiments, DIY projects and small circuit maintenance

Specifications

No published specifications for this item yet.

Questions about this item

What input voltage range must I provide for the XR-103 module to operate safely?

The supplier states you must confirm the input voltage range before powering on to guarantee safe and stable operation.

Can the LM337 regulator share a common ground with older analog circuits I am keeping?

The module delivers positive and negative adjustable stabilised voltage, so a shared reference is possible when wired according to the specification.

How do I verify the XR-103 is regulating correctly after wiring it up?

Measure the output with a multimeter while adjusting the trimmer; the voltage should track smoothly and remain steady under load.

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