By popular demand I am coming back to Excel after a long hiatus. This is an update of an older model previously presented on this blog. > I added a few features to the roller coaster model as follows: 1) Performance log 2) All sorts of colors and color scheme selection 3) Speed control 4) Coaster length adjustment 3) Ground… Read More... "Excel Roller Coaster Update #1"

## About the Speed of Spreadsheets #2

This is the second post on Excel speed. This has serious implications in creating usable Excel animations. The first part benchmarked the calculation speed of Excel 2003 versus Excel 2007 for various size arrays of formulas. This part analyzes the effect of formula complexity on the spreadsheet speed. About the speed of animated models in MS Excel – part #2… Read More... "About the Speed of Spreadsheets #2"

## About the Speed of Spreadsheets #1

This post considers several aspects about improving the speed of spreadsheets in both MS Excel 2003 and 2007. It has significant effects on animations in MS Excel. In this first part, a “stopwatch” macro is described which, when incorporated in any of calculation loop, can measure the frequency your loop is executed. In this first part of the tutorial the… Read More... "About the Speed of Spreadsheets #1"

## 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 and… Read More... "Longitudinal Aircraft Dynamics #5 – finishing the aircraft"

## 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.… Read More... "Longitudinal Aircraft Dynamics #4 – virtual aircraft definition"

## 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 which… Read More... "VertX – a Very Useful Macro for Extracting the Vertex Coordinates of Freeforms – part #2"

## 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 worksheet… Read More... "VertX – a Very Useful Macro for Extracting the Vertex Coordinates of Freeforms – part #1"

## How to Model a Phase-Locked Loop (PLL) in Excel – part#4

This last section of introductory PLL modeling shows how to upgrade the model with adjustable scale charts for three voltage signals within the loop. The model also shows how to create a Lissajous based phase display. [sociallocker][/sociallocker] How to Model a Phase-Locked Loop (PLL) in Excel – part #4 -This is the continuation of part #2 of the PLL tutorial. The previous… Read More... "How to Model a Phase-Locked Loop (PLL) in Excel – part#4"

## How to make a game of PONG in Excel – part #10 – final

The previous section explained the VBA upgrades needed to make the score functional and new-game and end-game sound effects were added. This tutorial shows how fix some previous bugs and create a “demo play” option which means that both bats are automatically run by worksheet logic. This is the final part of the of the Pong tutorial series. [sociallocker][/sociallocker] Excel PONG Tutorial #10 – adding… Read More... "How to make a game of PONG in Excel – part #10 – final"

## How to make a game of PONG in Excel – part #9

The previous section explained how to add a game score in the upper part of the pong court. This section (which is a continuation of part#8) will explain the VBA upgrades needed to make the score functional. We will add here new-game and end-game sound effects too. Next tutorial will explain how to create a “demo play” option which means that both bats… Read More... "How to make a game of PONG in Excel – part #9"