So we’ve explored the world of logic-level outputs, exposed a pitfall that we’d fallen into, and ended up revealing an unexpected feature of a popular board.

The purpose of a circuit diagram is to convey the maximum amount of information in the most efficient fashion. One aspect of this is that the signals carried by the wires may be active-high or ...

Part 1 – Assertion–Level Logic Part 2 – Positive vs Negative Logic Part 3 – Reed Muller Logic Part 4 – Gray Codes Beware – here be dragons! In a moment we're going to start throwing terms around such ...

The third part, 74AVC4T345FT (see diagram), is for SPI interfaces. Instead of two pairs of channels, it has a single channel and a triple channel controlled by the two direction pins and the two ...

You can get converters that specifically output logic-level signals but you probably can’t pick one up at the local office supply store. They might, though, have a normal USB to serial cable.

This MAX5391 will interface 5-V logic with a 5-V supply and accommodate 3-V logic with a 3-V supply. Now suppose that someone wants to mate this part to 3-V logic in the input, but with a 5-V supply.