Lots of programs take data from a file and create an X-Y graph under Linux. Desktop applications like xplot, gnuplot or even PHPlot do a great job. But, what if you want to see how a physical process ...

[Johannes] just sent us a tip about his small plotter that plots out the current time. [Johannes] small clock plotter uses a dry wipe pen to write out the time on a small piece of dry erase board. The ...