The LM324 low-voltage quad op-amp is decades-old design that it refuses to die – because it subtler characteristics are just so useful. For example, it works single-supply from 3V to 30V, its inputs ...

This pulse oximeter is so simple and cheap to build it’s almost criminal. The most obvious way to monitor the output of the sensor is to use an oscilloscope. The poor-man’s stand-in for that is a ...

Delivering many improved major specs over traditional LM324 op-amps, but with rail-to-rail inputs and outputs, STMicroelectronics has introduced a 6MHz all-rounder op-amp family that will operate from ...