## An Interactive Gated Ring Oscillator Tutorial – part #4

This is the fourth part of tutorial about making an interactive animated Excel model of a gated ring oscillator in MS Excel 2003. This section adds a joystick to the model which smoothly adjusts the RC delay constant (vertical movement) and the number of delay stages within the ring (horizontal movement). An additional function of the joystick is to control the gatingContinue Reading

## An Interactive Gated Ring Oscillator Tutorial – part #3

This is the third part of tutorial about making an interactive animated Excel model of a gated ring oscillator in MS Excel 2003. This section deals with upgrading the model from a static table based one (with only 800 time steps) to a hybrid static-dynamic which is reasonably fast, yet it can run for an indefinite number of timeContinue Reading

## An Analog Clock Model – video preview

This is a video preview of the analog clock series which include a model section and a tutorial section. [sociallocker][/sociallocker]Continue Reading

## Longitudinal Aircraft Dynamics #5 – finishing the aircraft

This section finalizes the aircraft (glider) by inserting the wing, the horizontal stabilizer and a center of gravity (CG) sprite in the layout. [sociallocker][/sociallocker] Longitudinal Aircraft Dynamics #5- putting the glider together by George Lungu – This section puts together the fuselage, main wing and stabilizer with the proper scale, shift and rotation determined by the input parameters. Scaling andContinue Reading

## Longitudinal Aircraft Dynamics #4 – virtual aircraft definition

This section of the tutorial explains how to create the  2D aircraft components for the animated longitudinal stability model. The first part deals with extracting the x-y coordinates for the fuselage, canopy, vertical stabilizer and rudder. The second part handles the main wing airfoil and the horizontal stabilizer airfoil. All thses parts will be put together in the next section.Continue Reading

## VertX – a Very Useful Macro for Extracting the Vertex Coordinates of Freeforms – part #2

The first macro created in this section of the tutorial improves on the previously developed macro by correcting the up-down orientation of the shape, referencing the shape position to the coordinate of the first drawn point and closing the shape by repeating the coordinates of the first point at the end of the table. A last macro is then created whichContinue Reading

## VertX – a Very Useful Macro for Extracting the Vertex Coordinates of Freeforms – part #1

Using autoshape freeforms is a very easy way to duplicate object outlines from pictures. It is convenient to create a freeform and once created, its vertices (points) can be edited with without difficulty. Aditional points can be inserted and others can be deleted. This is a tutorial about a series of macros which allow the extraction of freeform vertex coordiantes to a worksheetContinue Reading

## How to Make an Analog Clock in Excel

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