USB to 3 Micro USB Cable Connection: A Detailed Guide
When connecting a single USB cable to three different micro USB devices, such as three DC axial fans, the first and most crucial step is to ensure that you understand the basics of how USB cables are constructed and how to properly split the power and data connections. This guide will provide a comprehensive explanation of how to accomplish this task safely and effectively.
Understanding USB and Micro USB Cables
A standard USB cable typically comprises four wires: two for power (-) and ( ) and two for data. The positive and negative power wires are positioned at the right-hand and left-hand sides of the connector, respectively, while the data wires are located in the middle. For micro USB cables, this configuration is similar, ensuring compatibility with standard USB devices.
When attempting to connect one USB cable to three fans, you need to ensure that you are only dealing with the power wires and not the data wires, as the fans do not require data transmission.
Why Multiple Power Sources?
Connecting multiple power USBs to multiple sources can significantly decrease the current output, making it less efficient. Therefore, it is recommended to use a USB power supply with three USB ports. This will allow you to connect one fan to each port, ensuring that each fan receives the necessary power without overloading the USB port.
Alternatively, you can use a single USB cable and create a custom 1-to-3 splitter cable. However, it is essential to ensure that the splitter cable does not exceed the maximum power output of the USB, which is 5V at 2A.
Creating a Custom Splitter Cable
For those who prefer a DIY approach, you can create a custom 1-to-3 splitter cable. Here are the steps to follow:
Use the Right Wires: You will need four wires in total: two red wires for the positive ( ) power and two black wires for the negative (-) power. You can use multicore wires or individual wires depending on your preference.
Identify the USB Pin Out: The USB connector has two data pins (D and D-), two power pins (V and V-), and a ground pin. The power pins are typically at the edges of the connector, while the data pins are in the middle.
Strip and Connect the Wires: Strip the insulation from the wires and connect the positive wires to the V pin and the negative wires to the V- pin. Ensure that the connections are secure and insulated to avoid short circuits.
Test the Connection: Before plugging in the fans, test the connection with a multimeter to ensure that the voltages and currents are as expected.
It is important to note that for safety reasons, it is recommended to use a multi-USB port power supply or a 1-to-3 splitter cable specifically designed for USB power distribution.
Conclusion
Connecting one USB cable to three micro USB fans is a feasible task, but it requires a proper understanding of USB cable construction and the appropriate configuration of the power connections. Using a multi-port USB power supply or a custom 1-to-3 splitter cable is the safest and most efficient method.
For more information on USB and micro USB connections, power supplies, and DIY projects, refer to the resources below:
USB Connection Types - How to Build a 1-3 USB Splitter Cable - Instructables USB Power Supply Guide - StreamsiderHappy building!