ImageWriter II Printer Resurrected

I’ve had an ImageWriter II printer gathering dust in the back of my closet for at least a decade. Originally purchased at the Silicon Valley Electronics Flea Market for 25 cents, it was an obsolete anachronism even then, and the…

TXB0104 diagram

A Tale of Three Bidirectional Level Shifters

Level shifters, voltage translators: whatever you call them, these devices are very handy when interfacing 5V and 3.3V logic for devices that aren’t 5V-tolerant. The 74LVC244 has long been my go-to solution for unidirectional 5V to 3.3V level shifting, and…

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