● 17 min readShowdown: Uno R4 vs Uno R3 vs Nano
Welcome to Vol. 12 of The Probots Showdown. Three boards. Three price points. Three very different futures for your project.Should you stick with the
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| QTY | Unit Price(Inlc. GST) | |
| 25+ | ₹293.02 ₹ 248.32 + 44.7 GST | |
| 50+ | ₹290.03 ₹ 245.79 + 44.24 GST | |
| 75+ | ₹287.04 ₹ 243.25 + 43.79 GST | |
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High-power 5A buck converter with adjustable output from 1.25V to 36V. Features constant current (CC) and constant voltage (CV) modes with onboard status LEDs.
Precision power meets high-current performance. The XL4015 Buck Converter is a versatile step-down module engineered for tasks that require more than just simple voltage regulation. With its dedicated Constant Current (CC) and Constant Voltage (CV) adjustment pots, this module provides the granular control needed for charging sensitive lithium batteries or safely powering high-wattage LEDs.
Probots™ ProSpec Grade Power Integrity Unlike basic regulators, the XL4015 is Probots™ ProSpec Grade , featuring high-quality filter capacitors and a robust inductor to maintain stable output even under significant loads. The module includes three onboard status indicators: a Red light for constant current mode, a Blue light to show active charging, and a Green light to signal a full charge or idle state.
Input Voltage Range: 4V to 38V DC
Output Voltage Range: 1.25V to 36V DC (Continuously Adjustable)
Maximum Output Current: 5A (Heatsink recommended for >3A)
Regulation Modes: Constant Current (CC) and Constant Voltage (CV)
Conversion Efficiency: Up to 96%
Switching Frequency: 180KHz
Status Indicators: Red (CC Mode), Blue (Charging), Green (Full Charge/Idle)
Terminals: Screw-type "IN+"/"IN-" and "OUT+"/"OUT-" for secure wiring
Lithium Battery Charger: Safely manage the CC and CV stages for DIY battery packs.
High-Power LED Driver: Drive 10W–50W LED arrays with stable, regulated current.
Bench Power Supply: Create a portable, high-current, adjustable lab supply.
Vehicle Power Systems: Convert 24V truck power to stable 12V or 5V for auxiliary equipment.
Unlock New Capabilities (Project Evolution)
Feature Upgrade: The addition of the Current Adjustment pot allows this module to function as a safety limiter, preventing connected circuits from drawing too much power and burning out.
Effort Level: Intermediate. Requires a multimeter and basic knowledge of CC/CV charging principles to calibrate properly.
Virtual Technician & Tips
Probots™ Logic-Safe Setup: When using this for battery charging, adjust the output voltage to the battery's "float" voltage first, then short the output with an ammeter to set the maximum charge current using the CC pot.
Pro Tip: Clockwise rotation increases both voltage and current limits. If drawing more than 3A continuously, add an adhesive aluminum heatsink to the XL4015 chip to prevent thermal throttling.
1 x XL4015 Step-Down Buck Converter Module
FREQUENTLY ASKED QUESTIONS (FAQ)




Probots sells every Electronics Part for your next Project. You can order 10,000+ Electronic Parts Online - Arduino, Raspberry Pi, NodeMCU Development Boards, Sensors, Motors, Motor Drivers, SMPS, Plastic Enclosures etc in India directly on probots.co.in
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Probots sells every Electronics Part for your next Project. You can order 10,000+ Electronic Parts Online - Arduino, Raspberry Pi, NodeMCU Development Boards, Sensors, Motors, Motor Drivers, SMPS, Plastic Enclosures etc in India directly on probots.co.in
We offer specialized services for Bulk, Wholesale & B2B Customers like discounted prices, additional shipping options, customised products, etc . Customer with large quantity & regular orders qualify for the specialised discounted rates.
We also offer dedicated sales team to assist you with the order process by providing sales quotations, PI, technical support for choosing products, etc.
Note: Business Orders are processed manually and usually take 1-3 days to process compared to placing the order directly on our website. Please plan your purchases accordingly.
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Probots Electronics is highly regarded for its great selection of components and professional service. Customers frequently praise the awesome care and timely delivery provided by the team to ensure all products arrive safely.
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