9*7 MM Microphone Electret Microphone with 2 Pin
KSH 70.00
Out of Stock
The 9x7mm Electret Microphone is a compact, highsensitivity condenser microphone cartridge featuring a builtin FET amplifier and 2pin interface. This smallform-factor microphone delivers clear audio capture for voice, sound, and acoustic detection applications with Arduino, ESP32, and other microcontroller projects.
| Parameter | Value |
|---|---|
| Dimensions | 9mm x 7mm |
| Type | Electret Condenser |
| Polar Pattern | Omnidirectional |
| Sensitivity | -42dB ±3dB |
| Frequency Range | 50Hz - 20kHz |
| Impedance | ≤2.2kΩ |
| S/N Ratio | ≥58dB |
| Supply Voltage | 2V - 10V DC |
| Current Consumption | ≤0.5mA |
| Operation Temp | -20°C ~ 70°C |
| Pin Configuration | 2 pins (Positive + Negative) |
| Polarity | Positive pin marked (red or "+") |
= Key Features =
High Sensitivity - Clear audio capture for voice and sound
Builtin FET Integrated amplifier for strong output signal
Omnidirectional - Captures sound from all directions
Small Footprint - 9x7mm size for compact projects
Wide Voltage Range 210V DC operation for flexibility
Low Power - ≤0.5mA current consumption
Simple Interface 2pin connection for easy integration
| Microphone Pin | Connection | Description |
|---|---|---|
| Positive (+) | 3.3V or 5V (through 2.2kΩ resistor) | Power supply with bias resistor |
| Negative (-) | GND | Common ground |
| Signal Output | Analog Pin (A0) | Connect at resistor junction point |
> Typical circuit: Connect VCC→2.2kΩ resistor→Microphone Positive→Output to ADC
VCC (5V) ── 2.2kΩ Resistor ──┬── Microphone (+) ── Output to Analog Pin
│
Microphone (-) ─── GND
int micPin = A0;
int micValue = 0;
void setup() {
Serial.begin(9600);
}
void loop() {
micValue = analogRead(micPin);
Serial.println(micValue);
delay(10);
}
√ Works with 3.3V and 5V systems
√ Simple 2-pin connection
√ No additional amplifier required for basic use
√ Reliable and durable construction
√ Perfect for DIY sound projects
The 9x7mm Electret Microphone delivers highquality audio capture in a compact, easyto-use package. Perfect for voice, sound detection, and creative Arduino projects.
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