The 74HC00 data sheet warns that inputs must not be allowed to float because this makes the output indeterminate. Now, that in itself is a good reason, but there is more… In my previous column, we ...

Somehow, though, that doesn’t seem as much fun as virtually connecting 7400 chips together. Don’t ask us why. There’s also a link to an impressive open source web-based logic simulator. You can grab ...

Transistor-transistor-logic or TTL parts have been around for a long time and now and then, I still seem to run across this or that “thing” where they've been designed in, not necessarily in the ...

When you go on your favorite cheap online shopping platform and order a batch of  74LS logic ICs, what do you get? Most ...

I fear the topic of this column is poised to unleash a tsunami of controversy. My engineering accomplice Joe Farr says that this is one of those topics that, when presented to 10 different engineers, ...

You can’t leave unused inputs floating, but you might not want to connect them to a power or ground rail either. Digital engineers learned long ago that they should not leave unused inputs unconnected ...

It’s my own fault. I have only myself to blame. I knew I was opening a can of worms when I first thought about writing a column on the topic of applying pull-up and pull-down resistors to the inputs ...