Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Sensors |
| Origin | - |
| Model Number | MAX9814 |
| Operating Voltage | 2.7V - 5.5V DC |
| Gain Control | Automatic Gain Control (AGC) |
| Signal-to-Noise Ratio | Typically 96 dBA |
| Frequency Response | 20Hz to 20kHz |
| Output Type | Analog Audio Signal |
| Microphone Type | Electret Condenser Capsule |
| PCB Dimensions | 16mm x 12mm |
| Interface | 3-Pin Header (VCC, GND, OUT) |
| Application | Voice Recognition, Recording, IoT Projects |
Anonymous
Mar 27, 2026
Rating: 5/5
Great for student projects
Bought ten of these for our university robotics club. They are robust and easy to integrate into Raspberry Pi and ESP32 projects. Highly recommended for educational use.
Anonymous
Mar 23, 2026
Rating: 5/5
Compact and reliable
Small form factor makes it easy to hide inside 3D printed enclosures. I used it for a voice-activated light switch, and the sensitivity is adjustable via the onboard resistor if needed.
Anonymous
Mar 16, 2026
Rating: 5/5
Perfect for Arduino Voice Projects
This module works flawlessly with my Arduino Uno. The automatic gain control really helps stabilize the audio levels when I move closer or further from the mic. Setup was straightforward using the three pins.
Anonymous
Mar 11, 2026
Rating: 4/5
Solid performer
Does exactly what it says on the tin. The voltage range is flexible enough for both 3.3V and 5V logic systems. Noise floor is low, which is great for sensitive applications.
Anonymous
Mar 08, 2026
Rating: 4/5
Good quality, clear sound
The audio output is surprisingly clear for such a small module. I used it for a home intercom prototype. Only giving 4 stars because the soldering pads are a bit small for beginners.
Anonymous
Mar 05, 2026
Rating: 5/5
Excellent AGC performance
I've tried several microphone modules, and the MAX9814 has the best Automatic Gain Control I've seen in this price range. It handles loud noises without clipping effectively.
Q: Is the output digital or analog?
A: The output is analog. You will need an ADC (Analog-to-Digital Converter) pin on your microcontroller to read the signal.
Q: Can I connect this directly to a computer's line-in jack?
A: While possible, we recommend using a coupling capacitor to block any DC offset before connecting to a computer's audio input to prevent potential damage or noise.
Q: Does this come with the microphone capsule included?
A: Yes, the module comes pre-assembled with the electret microphone capsule soldered onto the board.
Q: Can this module be powered directly by a 3.3V pin on an ESP32?
A: Yes, the MAX9814 operates within a voltage range of 2.7V to 5.5V, so it is fully compatible with the 3.3V output from an ESP32.
Q: What is the distance range for effective voice pickup?
A: For clear voice recognition, the effective range is typically between 1 to 3 meters depending on ambient noise levels and enclosure design.
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