AI03 MIC&VR&LED

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Read this official Leafony page and explain its key points in English. For hardware help, first ask for a photo or the installed leaf models, assembly and power sources, then the goal and tools. Clarify which LED or display changed and whether a cable or leaf was replaced. Do not equate an unseen reset button with an absent one, or I2C acknowledgement with a working display. Verify specifications against sources; distinguish observations from hypotheses. Follow a redirect to its destination; if unreadable, ask for the relevant text instead of guessing.

Page: AI03 MIC&VR&LED

URL: https://docs.leafony.com/en/leaf/io/ai03/

Description / headings (excerpt): Features / Specification / Dimension / Microphone

Table of contents

Features

Capture ambient sound with the microphone, read the potentiometer setting, and turn the LED on or off. Combined with an MCU (microcontroller) leaf, this leaf can be used in programs that read changes in sound.

The MEMS microphone and potentiometer connect to the MCU leaf’s analog input pins, and the LED connects to a digital output pin. To reduce power consumption, you can turn off the power through a load switch controlled by the I2C Expander.

Specification

Dimension

Item	Description
Dimension	W23×D20.5×H4.7mm

Microphone

Item	Description
Part number	SPW2430HR5H-B
Type	MEMS
Direction	Omnidirectional
Frequency range	100Hz ～ 10kHz
Gain	0dB
Interfaces	Analog

Volume

Item	Description
Part number	ST-4ETA10kΩ
Nominal resistance	10kΩ
Resistance law	Linear law (B)
Effective electrical angle	210° (1 turn)

LED

Item	Description
Part number	SML-A12Y8TT86
Package type	Side-view
Emitting color	Yellow

I2C I/O Expander

Item	Description
Part number	PCA9557RGVR
Interface	I2C (Address: 0x1B)

Block diagram

Pinassign

Tips

About Microphone, Volume and LED

Item
Microphone MK500
Volume VR500
LED