Simple logic analyzer for hobbyists

Logic analyzer isn’t a “must have” tool, especially for hobbyists. Most measurements of logic signals can be made with oscilloscope. But it doesn’t hurt to have one especially it costs cents literally.

logic_analyzer_schematic

One condition has to be met – your computer must be equipped with parallel port as this device is built for it. It uses only one chip – octal bus transceiver 74HC245N. Other is bunch of resistors and connectors. On PC side you will need a logic analyzer program that can be downloaded here. [Source]

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