Sound direction detection is a fascinating concept in robotics and automation. It allows a device to "hear" and determine the direction of a sound… November 23, 2024 Build a Simple Arduino RC Boat ...

With cheap and easily available chips that perform this exact job, it might seem a little loopy to throw 20 LM324 op-amps at the job. But as [gschmidt958] explains, this is strictly for the ...

He does this by using a standard electret microphone, half of an LM324 op amp, a voltage comparator and a PIC micro controller. The operation of the device is as simple as its wiring, the ...