The SerialComm USB-TTL-33 is a high quality, high performance, USB to 3.3V TTL Converter with included terminal block and features ESD and surge protection in a 9 pin format. It is a combination of the SerialComm USB-232-2 and TTL-232-33P Converters.
The key to getting a good workout on an elliptical machine is by using your arms properly during the exercise. Stand straight rather than tilting forward to get the most benefit in your lower body. Free weights are another common and effective type of home exercise equipment. With a weight bench, a set of dumbbells and a barbell with weight plates, you can exercise every muscle in the body. Exercise balls and medicine balls also offer a whole body workout, and this exercise is very gentle on your joints and back.
3) Upper-Body Workout. As you might expect, rowing machines provide a stellar upper-body workout. Rowers exercise the rhomboids in the shoulders, trapezii in the upper back, and lats in the lower back. The benefits of a stronger back and shoulders include improved posture as well as a reduction in back pain.