Digital calculator using discrete 7400 series logic ICs

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Two students (Umair Mukati and Naveed Ahmed) from Institute of Industrial Electronics Engineering in Karachi, Pakistan built this 5-bit signed data calculator using the 74 and 40 series logic ICs. This project is also their entry for the ongoing Open 7400 Competition organized by Dangerous Prototypes. The calculator does addition and subtraction functions on 5-bit signed data. The fifth bit is the sign bit. The 7485 comparator IC is used to detect the negative output. The result is displayed on a 3-digit seven segment display.

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Norfolk Mini Maker Faire 2012

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Yesterday (October 20, 2012) was Mini Maker Faire day in Norfolk, Virginia. This was the first Maker Faire happened in the Hampton Roads area. It was really good to see people from local hackerspaces and maker communities and their interesting projects. Here are some pictures that I took at the event.

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A quick start-up guide for TI’s Stellaris Launchpad

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The Stellaris® LM4F120 LaunchPad Evaluation Board is a low-cost evaluation platform for ARM® Cortex™-M4F-based microcontrollers from Texas Instruments. This quick start-up guide from Texas Instruments will help you verify that your tools are properly installed and that you can edit, compile, download and debug your code on the Stellaris® LM4F120 LaunchPad.

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