USB Hub - Interesting

[Electroenthusiast]

The image in the attachment shows a cheap under 2 $ USB Hub which a friend was using today. All that i was amazed was that it had switches to control it, and this was the cheapest one i heard around while i paid even more to get one which had no switches in it.

Don't you think that switches aren't required for these at all?

 

[tumbleweed]

The switches are required, but if you connect/disconnect things a lot they're very handy.
I use them during development and it saves constantly plugging/unplugging cables.

 

[Electroenthusiast]

My question is why does a cable needs to be unplugged, when you can rather not use even it if plugged.

I guess the circuitry inside wouldn't be much complicated, with switches just closing and opening the power line. If that isn't the case, can somebody explain?

 

[tumbleweed]

I meant they aren't required. autocorrect's a pita sometimes.

If they're plugged in they're consuming power and resources. Maybe you don't want that.
If you have them and don't care, don't use them.

I see "save earth" in your sig, so I would think it matters to you.

 

[For The Popcorn]

If you have I2C or serial components, you can get into trouble during program development. Depending on what's happening when you load code or press reset, you can leave a chip in a hung state and suddenly what was working perfectly now doesn't work at all. Getting a clean "power on" restart is a good idea sometimes.