Hi! Here is an improved (faster and cleaner) version of the harmonograph. The worksheet has three different areas, the physical machine (a photo of the machine build out of wood by Karl Sims), the virtual machine (which is a 2D chart with a top view of a model showing the three pendulum ends, the drawing table, and the linkage mechanism which connects pendulum #1,Continue Reading

Hello folks, here is a tutorial about building a clock in Excel. Enjoy! [sociallocker][/sociallocker] Building a live Excel clock by George Lungu Here are a few date and time functions in VBA: Now  : Current date and time.   Example: 7/5/00 3:16:38 PM returned by Now Date  : Current date only.           Example: 7/5/00 returned by Date Time : Current time only.          Continue Reading