This is a typical interface to avoid—looks clean and simple and works with most logic interfaces, but does not work with the 555. What a simulator would show? A simulator cannot handle out of spec ...

Compare any modern data sheet with that for the venerable NE555 timer chip. I chose to use the 555 as an illustrative example to pay homage to the designer, Hans Camenzind, who died recently. The ...

Sometimes the best inspiration is limitation. The 555 timer does “one thing” — compares a voltage to a couple thresholds and outputs a signal accordingly. It’s two comparato… ...

With a 555 on the BOM, you never know what you’re going to get. With 40 of the versatile timer chips in a build, you might just get something completely unexpected, like this 555-based eight-… ...