DC-DC 4.5-40V To 5V 2A USB Charger Step down Converter Voltmeter Module

This Voltmeter Module is a DC-DC 4.5-40V To 5V 2A USB Charger Step down Converter, which combines the functions of a voltage checker and 2A charger.

The module creates a very consistent 5V 2A output from an input of 4.5–40V. There is a USB connector on the device that allows you to charge your phone. Please keep in mind that your device’s output is regulated at 5V/2A when charging it.

All you have to do is plug this device into the power source to start measuring voltage in real time. Click the “Output Enable” button when you need to charge your phone, IPAD, MP3, or other digital device. The USB power indicator will light up and begin to supply 5V and 2A at its output.

Click the “Low Power” button to switch to the ultra-low power standby mode and shut down the USB output when you need to turn off the voltmeter.

It measures the voltage required for various situations and accepts a wide range of input voltages, including those from cars, motorcycles, and battery cars. A range of USB devices can be accommodated by the output current capability of 5.0V/2A.

Note:
This module default D + D- short, most of the cell phone charger is compatible, and set aside a variety of mobile phones identification resistor installation location, if you need to add the identification resistor, please connect D + D- wires cut, then added.

Voltmeter Calibration Method

Step1: Press the “Output Enable” button  more than 2 seconds, release, voltmeter flashes, this time into the voltage regulation mode;

Step2: Press the “Output Enable” button (normal speed), the voltage value is adding up a unit; Press the “Low Power” button, minus a unit; Due to a unit is less than 0.1V, the minimum voltage display to 0.1V, so you need to continuously press 1-5 times to see the voltmeter change 0.1V, how many times voltmeter change 0.1V by pressing the button, depending on the current display voltage, the higher the voltage, the fewer the number of press.

Step3: press the “Output Enable” button for more than 2 seconds, release, to exit the voltage calibration mode. Data is not lost after the power failure.

Application:

1. Cars and Electric Bikes
2. Motorcycle for voltage measurement and to charge the phone
3. iPads, Mobile Phones
4. Mp3 Devices

Features :

1. The voltmeter has an automatic calibration function.
2. With reverse connection protection.
3. With overheat protection and short circuit protection.
4. High efficiency and low ripple.
5. With USB power indicator light.