Description
What it is
The BUCK 4.5-40V 12V to 5V / 2A DC / DC Converter is an electronic device that allows converting an input DC voltage of 4.5 to 40V to an output DC voltage of 5V, providing a maximum output current of 2A.
Features
- Input Voltage: 4.5-40V
- Output Voltage: 5V
- Maximum Output Current: 2A
- Integrated Voltmeter Display
- Integrated USB Charger
What it is for
This converter is useful for powering prototypes and electronic devices based on Arduino or other microcontrollers that require a 5V voltage. The voltmeter display allows monitoring the output voltage in real-time, while the integrated USB charger allows recharging mobile devices.
Tutorial: How to use the BUCK Regulator ARD0011120
This DC/DC BUCK converter is used to regulate voltage from 4.5 to 40V down to 12V and then to 5V, providing a maximum current of 2A. It is useful for powering prototypes and devices based on Arduino.
What you need
- BUCK Regulator ARD0011120
- Arduino or electronic circuit
- Power supply (4.5-40V)
- USB cable
Steps
- Check that the input voltage is between 4.5 and 40V.
- Connect the power supply to the Vin pin of the converter.
- Connect the Vout pin to your Arduino device or circuit.
- Connect the GND pin of the converter to the GND of the circuit.
- Connect a USB cable to the Vout pin to charge a USB device.
- Check the maximum allowed current in the datasheet.
- Test the converter with a USB charger to verify the current.
- Check the output voltage with a multimeter.
Mini project
Create a USB power supply for an Arduino device using the BUCK converter. Connect the converter to your Arduino and a USB device. Check the current and voltage.
Common mistakes
- Connect power supply over 40V.
- Do not check maximum current.
- Ignore the GND pin.
- Do not test output voltage.
Recommended accessories
- Arduino Uno
- Multimeter
- Adjustable power supply
- USB cable
Frequently asked questions
Can the power converter directly power an Arduino?
No, the Arduino needs separate power to function correctly. Use the converter to power a USB power supply.
What is the standard output voltage?
The standard output voltage is 5V.
Can I use this converter with a 42V power supply?
Check the datasheet, but generally not over 40V.
Does the converter automatically regulate voltage?
Yes, the converter automatically regulates voltage from 4.5 to 40V to 5V.





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