A simple, inexpensive method for building a temperature strip-chart recorder involves a parallel port that communicates with four TMP121 IC temperature sensors (Fig. 1). The sensors ...

Cell E1 counts the number of samples taken starting when you click on the Start button. As Excel gets the measurements, it will add them to the chart until the sample count equals the number of ...

A bar chart showing each day’s usage would be better as shown in Figure 2. Finally, I would prefer an axis label on the vertical axis saying “Usage in GB” and not having GB repeated at every ...