I’m working on a personal project that requires 6 Play Station Eye Cameras (if you think that sounds excessive, that’s because it totally is.) And when powering 6 USB cameras, you want to ensure you don’t exceed the maximum USB current draw of your computer. So I looked up the datasheet for the Play Station Eye, and found that the maximum current draw for a single camera is 500mA.
However, upon mentioning this to one of our mentors, he suggested that that spec could very well be an overly conservative estimate, as 500mA is also the maximum current limit of most USB ports. And sure enough, upon measuring the current using my handy dandy USB power measuring thingy, the actual current draw from one of these cameras when capturing video never goes above 120mA.
Granted, there is a microphone array on these cameras that I’m not using, which could increase the current draw past what is seen here. However, I kind of doubt that the microphone array draws 380mA (I could be completely wrong though.)
Just something interesting I discovered while tinkering that I thought might be relevant to anyone using these cameras (or 6 of them for that matter )