This article describes how to measure the power output from a USB port on Elo devices.

Measuring the power output from a USB port can be done using a simple low-cost USB power meter.
These devices are designed specifically for measuring voltage, current, and power delivered by USB ports.



Here's how you can measure the power:

1. Obtain a USB power meter: You can purchase a USB power meter online or from electronics stores such as this one. These devices typically come in a compact form factor and have USB connectors on both ends.
2. Connect the USB power meter: Plug one end of the USB power meter into the USB port from which you want to measure the power output. Make sure it's securely connected.
3. Connect the load (if necessary): If you want to measure the power output under a specific load (for example, if you're connecting a peripheral or charging a device), connect the load device to the other end of the USB power meter.
4. Read the measurements: The USB power meter will display various measurements such as voltage (in volts), current (in amps), and power (in watts). These measurements will give you an indication of the power output from the USB port.
5. Interpret the measurements: Voltage (V) indicates the electrical potential difference between the positive and negative terminals of the USB port. Current (I) indicates the flow of electric charge through the circuit. Power (P) is the product of voltage and current (P = V x I), measured in watts. This is the actual power being delivered by the USB port.
6. Record the measurements: If you need to keep track of the power output over time or for documentation purposes, you can record the measurements provided by the USB power meter.

Remember that USB ports can have different specifications (e.g., USB 2.0, USB 3.0, USB-C) with varying power output capabilities. Make sure to check the specifications of the USB port you're measuring to ensure compatibility with your device's power requirements.