LM2577 DC-DC Digital Voltmeter Booster Module

The LM2577 DC-DC Digital Voltmeter Booster module is an adjustable step-up (boost) converter with a built-in digital voltmeter display. It raises a lower DC voltage to a higher one that you set with the on-board potentiometer, and the display lets you watch the voltage without a separate multimeter. It is built around the LM2577 switching regulator, which has an internal 3 A power switch.

LM2577 DC-DC Digital Voltmeter Booster Specifications

• Controller: LM2577 step-up (boost) switching regulator
• Switching frequency: 52 kHz, fixed
• Switch current: 3 A peak (internal switch of the LM2577)
• Input voltage: from 3.5 V; check the board rating for the maximum
• Output voltage: adjustable with the potentiometer, always higher than the input
• Display: built-in digital voltmeter
• Isolation: none, input and output share the same ground

LM2577 DC-DC Digital Voltmeter Booster Applications

• Boosting a 3.7 V Li-ion cell to 5 V, 9 V or 12 V
• Running 12 V fans, relays and LED strips from a lower voltage supply
• Adjustable bench supply with a live voltage reading
• Solar and battery-powered robotics and IoT projects

What's in the Box

• 1 × LM2577 step-up converter module with digital voltmeter

Tip: Set the output voltage with no load connected, and check which voltage the display is showing, since some boards can switch between input and output readings. A boost converter draws more current from the input than it delivers at the output, so the higher the step-up ratio, the less output current is available.

Orders placed before 14:00 are ready for pickup the same day. Delivery across Lebanon usually takes 1–3 working days.