The basic way to calculate your maximum heart rate is to subtract your age from 220. For example, if you're 45 years old, subtract 45 from 220 to get a maximum heart rate of 175.
If you have an eighth-inch jack, all you've got to do is plug it into this port and start testing sound. 1  If you have a USB jack on the end of your microphone, most computers will have two or more USB ports on the side, or the back of the computer. 2  Simply plug the USB jack into one of these ports.
1. Get a hard drive disk enclosure. This is an external system into which you can place a computerâs hard drive in order to run it on another computer via a USB port; essentially, the enclosure will turn your laptopâs hard drive into an external hard drive.emove the disk enclosureâs connector plate and insert it into the hard drive interface. Look for connector pins at one end of the drive to see where to make this connection. 1  If you have an IDE hard drive, note that there is a detachable adapter sitting over the interface.