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Two blue LM2596 buck converter modules with LED voltmeter display terminal blocks and adjustment screw

BUCIER

BUCIER LM2596 Buck Converter Module with LED Voltmeter 4.0-40V to 1.25-37V Pack of 2

SKU CH-5EKN-Z8G15

A pack of two step-down modules that convert 4.0-40V input to 1.25-37V output with an onboard LED voltmeter

  • Type2PCS
  • ColorBlue
  • Dimensions4.9 in x 3.5 in x 0.5 in
  • LED voltmeter shows output within ±0.1V for quick monitoring
  • 0-40V input to 1.25-37V output covers many step-down needs
  • 150KHz LM2596 regulator with solid capacitors for stable, efficient conversion
  • Reverse-polarity diodes plus overheat and short-circuit protection guard the module
  • Terminal blocks and screwdriver adjustment let you connect and set voltage without soldering

DC-DC Step-Down Module with LED Voltmeter

This pack contains two BUCIER LM2596 adjustable buck converters that step a 4.0V to 40V input down to a 1.25V to 37V output. An onboard LED display shows the voltage with a ±0.1V measurement error. The display can be switched off by holding the button for one to four seconds. Terminal blocks allow solderless connections for quick wiring.

Adjustable Regulator for DIY and Vehicle Power

The module replaces fixed-voltage regulators when a project needs a precise, user-set output between 1.25V and 37V. A mini screwdriver adjusts the voltage, making the jump worthwhile for prototypes, car accessory supplies, or industrial gear that demand a specific rail. Input polarity protection diodes prevent damage from reversed connections, while overheat and short-circuit safeguards protect the circuit during development.

150 kHz Switching with Thermal Limits

The LM2596 core runs at a 150 kHz internal oscillation frequency and uses solid capacitors to filter high-frequency noise. Efficiency drops and heat rises as the voltage differential or load current increases, so loads above 15W require additional heat sinking. The voltmeter itself needs at least 4.0V at the input to operate, so very low-input designs will not show a reading. Builders who need synchronous rectification or higher switching frequencies must choose a different topology.

Pluspunten

  • LED voltmeter shows output within ±0.1V for quick monitoring
  • 0-40V input to 1.25-37V output covers many step-down needs
  • 150KHz LM2596 regulator with solid capacitors for stable, efficient conversion
  • Reverse-polarity diodes plus overheat and short-circuit protection guard the module
  • Terminal blocks and screwdriver adjustment let you connect and set voltage without soldering

Specificaties

BrandSeloky
ModelSY070
Type2PCS
ColorBlue
Dimensions4.9 in x 3.5 in x 0.5 in

Vragen over dit artikel

What are the module dimensions so I can check enclosure fit?

Each module measures 4.9 in x 3.5 in x 0.5 in, so allow that footprint plus clearance for the terminal blocks and the LED display.

How do I adjust the output voltage and what is the common mistake?

Use a mini screwdriver on the onboard potentiometer; the frequent error is turning it before applying an input voltage of at least 4.0 V, which leaves the display dark and gives no feedback.

When should I add extra cooling to the converter?

The manufacturer advises improving heat dissipation whenever the load exceeds 15 W to prevent the overheat protection from triggering.

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