How to adjust the volume of a USB audio device in OSX

You can usually adjust the audio level of your Macintosh computer using the sound slider bar and also using the volume keys on your keyboard. But if you plug in a USB audio device (Focusrite, Presonus, Behringer, Rode etc) the built in Audio controls are disabled. This is so that the full volume can be […]

How to charge your iPhone from your laptop battery.

Here is how to charge your iPhone from your MacBook Air battery. (It  will work for a MacBook Pro as well.)  Plug the phone into the MacBook Air USB port.  Open the lid and power up the MacBook Air.  Close the lid, putting the MacBook Air to sleep and the iPhone  will continue to charge!

Connecting a Microscope to your Mac

We recently moved to a small farm and we have been looking at our soil biology under a microscope. It was hard to see clearly so we bought a ‘Celestron’ Microscope camera (model #44421)  from Amazon for about $40. The packet doesn’t specify that it works with Apple computers, but it does and is very simple to use. It plugs into […]