1996 - 2016
BSEE - KB3UON
RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The Internet was still largely an unknown entity at the time and not much was available in the form of WYSIWYG ...
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The animated GIF (AGIF) on the left (below) was created using Microsoft's "GIF Animator" freeware. Four views are provided with a delay between each view. Rather than simply combining four separate, full-size images, only the parts that change each time are used. As you can see from the individual files sizes, the final AGIF is much smaller in file size than if four full-size GIF images had been used instead (it would have been ~128 kBytes).
This AGIF is composed of 4 images. The base image is full size (120x600 px). It displays initially by itself for 1 second. Then, image #2 displays for 1.8 seconds. Note that it is 116x130 px and is positioned at x=2 px and y=5 px. Image #3 is 114x98 px and is positioned at x=3 px and y=150 px, and displays for 1.8 seconds. Image #4 is 113x98 px and is positioned at x=3 px and y=260 px, and displays for 1 second (its parameter screen is not shown in screen capture). Then, the whole cycle repeats endlessly. Note that the three small images are superimposed over the base image using the "Transparency" check box, where the white background color for those three GIF images has been defined as transparent.
Posted July 16, 2015