Low-BOM Microphone Clap Sensor Using the OPAMPs inside the AVR DB

Forked from https://github.com/microchip-pic-avr-examples/avr128db48-low-bom-mic-interface-using-opamp

Added ADC measurements to detect peaks, in addition to timing, to use it as an advanced clap detector

Related Documentation

• AN3631 - Low-BOM Microphone Interface Using the Analog Signal Conditioning (OPAMP) Peripheral
• AVR128DB48 Curiosity Nano User Guide
• AVR128DB48 Device Page

Software Used

• Microchip Studio

Hardware Used

• AVR128DB48 Curiosity Nano
• Electret microphone
• One 2.2kΩ resistor
• One 1µF capacitor

Setup

• Connect the hardware together as seen in the schematic of the application note

Operation

• Clone the example to get the source code
• Open the .atsln file with Atmel Studio
• Edit the code inside the while loop to do what you want
• Start clapping! :)