Week 8 – Input Devices

Week 8 - Input Devices

October 2025

This week was mainly about Input Devices.

Follow this link to the group assignment.
Design and tested an audio input device using a microphone and Arduino.
Integrated the audio input device with a simple machine learning model for voice recognition, [still debugging].

Designed a custom PCB to integrate the microphone and Arduino for the audio input device.
Utilized KiCad for schematic capture and PCB layout design.
Ensured proper placement of components for optimal signal integrity.

Component	Specification
Microcontroller	SEED XIAO-RP2040
LED	CREE LED PLCC4 ( datasheet)
Microphone	I2S Microphone (ICS-43434, see details)

The microphone will capture audio input for processing.
The LED will be controlled based on the voice recognition from the microphone input.

Assembled the PCB and connected the microphone to the Arduino.
Conducted tests to verify the functionality of the audio input device.
Integrated the audio input device with a simple machine learning model for voice recognition, [still debugging].

Anyhow, below is a video of the microphone reading audio input levels in real-time for Goldberg Variations performed by Glenn Gould:

(Wait till the 0:18 switching from Aria to Var. 1. a 1 Clav.!!!!!!)