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Green PCB module XR-103 with LM337 chip and blue potentiometer

SMUGDESK

SMUGDESK XR-103 LM337 DC Adjustable Power Supply Module

SKU CH-JXFE-QEV2K

Adjustable LM337 regulator module provides positive and negative DC voltage for experiments and DIY circuits

  • Stable dual-polarity DC output using LM337 regulator chip
  • Continuous voltage adjustment via precision onboard potentiometer
  • Compact PCB layout for easy integration into DIY circuits
  • Built-in overcurrent protection reduces risk of module damage
  • Low ripple filtered power for analog and audio applications

LM337 adjustable regulator module

The XR-103 is a compact DC power supply board built around the LM337 linear regulator chip. It delivers positive and negative adjustable voltage output for analog circuits, operational amplifiers and small electronic equipment. Electronic hobbyists, students and audio experimenters use it as an auxiliary module for lab work and DIY projects.

Linear regulation limits efficiency

Because the LM337 operates as a linear regulator, the voltage difference between input and output is converted into heat. Continuous adjustment via the onboard potentiometer is convenient, but high current draw at large voltage drops will raise the module temperature quickly. The built-in overcurrent protection reduces the risk of damage from short circuits, yet it does not remove the thermal constraints inherent to linear designs.

Positive and negative dual-rail output decides

The defining feature is the ability to provide both positive and negative regulated rails from a single board. If a project requires a split supply for op-amps or analog signal processing, this module fits. If only a single positive rail is needed, or if the load demands high current at low dropout, a different topology would be more appropriate.

How it compares

Measured against everything we stock in Server & Hot-Plug PSUs, at today’s prices. Recalculated every night.

Price $16.99
Cheaper than about 96% of the 3,798 comparable items (median $131.99).

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Specifications

No published specifications for this item yet.

Questions about this item

Should I choose the XR-103 or a different LM337 module?

The XR-103 is the specific board offered here; it uses the LM337 chip for positive and negative adjustable DC output with onboard potentiometer control and overcurrent protection.

What does the LM337 chip actually deliver inside a circuit?

It provides continuously adjustable positive and negative regulated DC voltage with low ripple, suitable for analog circuits, op-amps and small DIY projects.

What wiring standard do the terminals follow and what current can they handle?

The module uses simple screw terminals for input and load connections; do not exceed the rated input voltage and load current to avoid damage.

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