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LM317 DC-DC adjustable step-down buck converter module
LM317 DC-DC adjustable step-down regulator module—simple, stable voltage control for Arduino, learning, and DIY electronics projects.
The LM317 DC-DC Adjustable Step-Down Buck Converter Module is a versatile linear voltage regulator module designed to provide a stable and adjustable DC output from a higher input voltage. Based on the LM317 regulator IC, it allows smooth output voltage adjustment, making it ideal for learning, prototyping, and low-noise power applications.
This module supports a wide input voltage range and provides an adjustable output voltage (typically from 1.25V up to 30V, depending on input). It is commonly used in Arduino projects, sensor circuits, educational labs, battery charging experiments, and DIY power supplies where simplicity and low ripple are important.
Featuring current limiting and thermal protection, the LM317 module offers safe and reliable operation, especially in low-current applications.

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- Dimensions: 1.25″x1.5″x0.37″
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Text support rate is better
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 Interface operation is simpler
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5V single power supply.
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Output directly connected to the speaker, can drive 4 ohms 3W / 8 ohm 2W speakers
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Busy status output, can be connected to the microcontroller IO or indicator light, no need to be left floating.
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 Voice effect optimization
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Dimension: 33*27.5mm
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With mounting holes

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