Accurate Frequency Detection is important for many projects such as Guitar/Piano Tuners, Vibration Analyzers, Heartrate Monitors, MEMs Sensor Analysis and Laboratory Instruments. There have been many fine examples of projects that try to solve this problem, for example: Arduino Frequency Detection by amandaghassaei  and Arduino Frequency Counter Library (instructables.com).But they all use Time Domain techniques; … Continue reading Reliable Frequency Detection Using DSP Techniques