Category Archives: Design and simulation

How to design a circuit from NAND-gates only,using a truth-table

Sometimes you’ll need some given digital outputs for some given inputs in your project. At least I do. There are several ways to do this, but I will use the Karnaugh mapping method.   First let’s be familiar with some … Continue reading

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CD4028/HEF4028 as a sub-circuit simulation in LTSpice

This is an article on how to simulate 4028 in LTSpice. If you need a custom IC that you know how to simulate, This method might be of interest. The principle is to create a schematics with the same name … Continue reading

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