The Buck Converter CC CV 1.2V-32V 5A Adjustable Power Supply DIY Kit (HW-212) is a versatile and efficient step-down module with integrated LCD display for real-time monitoring of voltage, current, power, and operational status. With adjustable constant voltage and constant current functionality, it ensures stable output tailored to your needs, making it ideal as a regulated power supply, battery charger, or constant current LED driver. Its compact design and ease of use make it an excellent choice for hobbyists, DIY electronics projects, and laboratory applications. Featured By RoboticsBD.
Product Images are shown for illustrative purposes only and may differ from the actual product.
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Features:
Adjustable Output: Provides 1.2V–32V adjustable voltage with up to 5A output current.
Constant Voltage & Current: Ensures stable performance for sensitive devices and charging applications.
LCD Display: Real-time monitoring of input/output voltage, current, power, and module status.
Multi-Functional Use: Works as a buck power supply, battery charger, or LED constant current driver.
High Efficiency: Designed for stable, efficient, and practical power conversion.
DIY Friendly: Compact, simple-to-use module for hobbyists and makers.
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Applications:
DIY regulated power supply for electronics projects.
Battery charging (e.g., lithium-ion, lead-acid) with adjustable current limit.
LED driver for constant current lighting applications.
Lab bench power module for testing and prototyping circuits.
Embedded projects where stable power supply is required.
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| Product Model | HW-212 Buck Converter CC/CV |
| Input Voltage | DC 5V – 32V |
| Output Voltage | DC 1.2V – 32V (adjustable) |
| Output Current | Up to 5A (adjustable) |
| Display Type | LCD (Voltage, Current, Power, Status) |
| Function Modes | CV / CC (Constant Voltage / Constant Current) |
| Applications | Power supply, Battery charging, LED driver |
| Module Type | Step-Down (Buck) |
| Dimensions | 11 × 7 × 3 cm |
| Shipment Weight | 0.110 kg |
| Shipment Dimensions | 11 × 7 × 3 cm |
Please allow 5% measuring deviation due to manual measurement.
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Documentation:
Parameters
Specifications
Model: HW-212
Input Voltage: DC 6.5V – 36V
Output Voltage: DC 1.2V – 32V (must be lower than input)
Output Current: Up to 5A (3.5A stable; 4.5A+ with heatsink)
Output Power: 50W continuous / 75W with heatsink
Conversion Efficiency: ~94%
Working Current: 30mA
Protections: Anti-reverse protection; no anti-backflow (external diode recommended)
Operating Temp: -20℃ ~ 85℃
Size (w/o shell): 68 × 47 × 26 mm
Size (with shell): 70.5 × 48.4 × 30 mm
Heat Sink: 20 × 14 × 6 mm
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Display & Controls
Digital Display: Voltage (1.2V–32V, ±0.1V) & Current (0–5A, ±0.05A)
Buttons:
ON/OFF: Toggle output / restore defaults
IN/OUT: Switch between input & output display
“+” & “–” Buttons: Adjust output voltage (0.05V steps; faster with long press)
Potentiometer (ADJ-I): Adjust output current (constant current mode)
LED Indicators:
ON (Green): Output active
CC (Red): Constant current mode
CHAR (Red): Charging
FULL (Green): Battery fully charged
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Operating Modes
Step-Down Power Supply
Adjust output voltage and current as required.
Provides stable regulated DC output.
Battery Charger
Supports constant current + constant voltage charging.
Suitable for Li-ion/LiPo batteries (e.g., 3.7V/2200mAh → 4.2V float charge, 2.2A max current).
LED Constant Current Driver
Adjustable current for driving high-power LEDs.
Protects LEDs from overcurrent.
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Notes & Precautions
Default output voltage is ~5V.
Input must be 0.5V higher than output.
Only for DC input (no AC).
Do not short outputs.
Ensure input power > load power.
Use heatsink/fan for high power loads.
Accuracy: ±0.1V (voltage), ±0.05A (current).
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Applications
Adjustable DC power supply
Battery charging (Li-ion, LiPo, lead-acid, etc.)
LED driver power
Lab testing & circuit experiments
Power conversion for DIY projects
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Package Includes:
1 × HW-212 5A Step Down Power Supply Module
1 × 20 × 14 × 6 mm Heatsink
2 × Acrylic shell plates
4 × Blue button caps
8 × Copper columns (M3)
8 × M3 Screws
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