Jaycar Arduino-Compatible Microphone Sound Sensor Module – Analog Output, Gain Adjustable

You want your build to react to how loud the room gets – a voice-activated switch, a decibel meter for a classroom, a pet-barking alert. This Keyestudio microphone sensor module does exactly that with no extra amplifier board. The S pin gives you a real-time analog voltage that tracks ambient sound level, so you read it on any Arduino analog input and set your own threshold. A built-in potentiometer lets you dial the gain up or down without touching code – turn it once on the bench and you're set. Draws under 10 mA at 3.3–5 VDC, so it won't starve your board's power rail. The fixed mounting hole drops it behind a panel or onto a PCB where you need it. Three pins. One analog read. Sound in, signal out

• Real-time analog voltage output on S pin – read ambient loudness on any Arduino analog input
• Built-in potentiometer for gain adjustment without code changes
• Operating voltage 3.3–5 VDC, draw under 10 mA
• 3-pin interface (VCC, GND, Signal) – no extra amplifier or breakout needed
• Fixed mounting hole for panel or PCB installation