loading
reading
writing
saving
searching
USB Power Injector - $25 (Pepperell)
QR Code Link to This Post
The problem may be that your computer can't supply enough 5 V USB power.
It's interesting that most interface manufacturers claim compatibility with USB 2.0 ports without specifying their power requirements. Focusrite is the only manufacturer I've found that clearly documents the power requirements of their products. The Scarlett 2i2 (Gen 1 through 3) for example, requires 900 mA.
Any USB audio interface with a USB-C connector for power and data is expecting that the computer can supply 1000 mA of power at 5 VDC. If you're connecting your interface to a computer with a USB-A connector, be aware that USB-A 2.0 ports are only required to deliver 500 mA at 5 VDC to meet USB requirements.
Connecting an audio interface that requires 900 mA to a port that can only deliver 500 mA is bound to result in flakey performance if it works at all.
Knowing the above situation, I designed the USB Power Injector to overcome the power problem. The USB Power Injector connects between your computer and USB audio interface and with the addition of a commonly available 5 VDC 1000 mA to 2000 mA (1 A to 2 A) power supply, the power problem is solved. You may even have a 5 V 1 A (or more) power supply left over from a cable modem or router that failed. Please note that the power supply must have a 2.5mm x 5.5mm connector with the center conductor being positive. (+5 VDC)
The USB Power Injector is fabricated in the USA by me with a professionally designed printed circuit board also fabricated in the USA and the balance of the components sourced worldwide. The USB Power Injector is supplied with 3M Dual-Lock velcro-like pads so that you can affix it directly to the USB audio interface. Being 1.2" x 2.2" and weighing only 0.7 oz., it needs to be securely mounted.
If the ad is still up they are still available.