{"product_id":"max4466-max9814-sound-sensor-module-arduino-raspberry-pi","title":"MAX4466 MAX9814 Sound Sensor Module for Arduino \u0026 Pi","description":"\n\u003ch2\u003eMAX4466 \u0026amp; MAX9814 Sound Sensor Module for Arduino \u0026amp; Raspberry Pi\u003c\/h2\u003e\n\u003cp\u003eAdd a high-quality audio input to your next electronics project with this fully assembled and tested electret microphone amplifier breakout board. Available in multiple variants — including the \u003cstrong\u003eMAX4466\u003c\/strong\u003e, \u003cstrong\u003eMAX9814\u003c\/strong\u003e, \u003cstrong\u003eKY-037\u003c\/strong\u003e, and \u003cstrong\u003eKY-038\u003c\/strong\u003e — this compact module delivers clean, low-noise audio capture for voice changers, audio recording, audio sampling, FFT-based audio-reactive projects, and more.\u003c\/p\u003e\n\n\u003ch3\u003eMAX4466 Microphone Amplifier — Features \u0026amp; Benefits\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eFully assembled with a \u003cstrong\u003e20Hz–20KHz electret microphone\u003c\/strong\u003e soldered on\u003c\/li\u003e\n  \u003cli\u003eUses the \u003cstrong\u003eMaxim MAX4466\u003c\/strong\u003e op-amp, specifically engineered for microphone amplification\u003c\/li\u003e\n  \u003cli\u003eExcellent power supply noise rejection for clean, clear audio capture\u003c\/li\u003e\n  \u003cli\u003eAdjustable gain via onboard trimmer pot: \u003cstrong\u003e25x to 125x\u003c\/strong\u003e (~200mVpp to ~1Vpp for normal speaking volume at ~6\" distance)\u003c\/li\u003e\n  \u003cli\u003eRail-to-rail output — up to 5Vpp at loud volumes\u003c\/li\u003e\n  \u003cli\u003eDC-coupled output with VCC\/2 bias; use a 100µF capacitor for AC-coupled audio equipment\u003c\/li\u003e\n  \u003cli\u003eSupply voltage: \u003cstrong\u003e2.4V – 5V DC\u003c\/strong\u003e\n\u003c\/li\u003e\n  \u003cli\u003eConnect GND → ground, VCC → 2.4–5VDC, OUT → microcontroller ADC pin\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eMAX9814 Microphone Amplifier with Automatic Gain Control (AGC)\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eMAX9814\u003c\/strong\u003e is a high-performance microphone amplifier featuring built-in Automatic Gain Control (AGC), a low-noise front-end amplifier, variable gain amplifier (VGA), output amplifier, and microphone bias voltage generator.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSupply voltage: \u003cstrong\u003e2.7V – 5.5V @ 3mA\u003c\/strong\u003e\n\u003c\/li\u003e\n  \u003cli\u003eOutput: \u003cstrong\u003e2Vpp on 1.25V bias\u003c\/strong\u003e\n\u003c\/li\u003e\n  \u003cli\u003eFrequency response: \u003cstrong\u003e20Hz – 20KHz\u003c\/strong\u003e\n\u003c\/li\u003e\n  \u003cli\u003eSelectable maximum gain: \u003cstrong\u003e40dB, 50dB, or 60dB\u003c\/strong\u003e\n\u003c\/li\u003e\n  \u003cli\u003eLow input-referred noise density: \u003cstrong\u003e30nV\/√Hz\u003c\/strong\u003e\n\u003c\/li\u003e\n  \u003cli\u003eLow THD: \u003cstrong\u003e0.04% (typ)\u003c\/strong\u003e\n\u003c\/li\u003e\n  \u003cli\u003eProgrammable attack and release ratio\u003c\/li\u003e\n  \u003cli\u003eLow-power shutdown mode\u003c\/li\u003e\n  \u003cli\u003eBuilt-in 2V low-noise microphone bias\u003c\/li\u003e\n  \u003cli\u003eSpace-saving 14-pin TDFN (3mm × 3mm) package\u003c\/li\u003e\n  \u003cli\u003eExtended operating temperature: –40°C to +85°C\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eKY-037 \/ KY-038 Sound Detection Module — Features\u003c\/h3\u003e\n\u003cp\u003eThese sound detection modules provide both analog and digital output for versatile project integration:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAO (Analog Output):\u003c\/strong\u003e Real-time voltage signal directly from the microphone\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDO (Digital Output):\u003c\/strong\u003e High\/low signal triggered when sound intensity reaches a set threshold\u003c\/li\u003e\n  \u003cli\u003e3mm mounting screw hole for easy installation\u003c\/li\u003e\n  \u003cli\u003e5V DC power supply\u003c\/li\u003e\n  \u003cli\u003eThreshold level output with onboard LED indicator\u003c\/li\u003e\n  \u003cli\u003ePower indicator light and comparator output LED\u003c\/li\u003e\n  \u003cli\u003eHigh-sensitivity electret microphone\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow to Connect\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMAX4466 \/ MAX9814:\u003c\/strong\u003e Connect GND to ground, VCC to 2.4–5VDC, and OUT to your microcontroller ADC pin. For best performance on Arduino, use the 3.3V supply rail.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eKY-037 \/ KY-038:\u003c\/strong\u003e Connect to 5V DC; read analog audio from AO pin or digital threshold detection from DO pin.\u003c\/li\u003e\n  \u003cli\u003eFor audio-reactive FFT projects, connect the OUT pin directly to your Arduino\/Raspberry Pi ADC and use an FFT driver library to translate audio input into frequency data.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIdeal Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eVoice changers \u0026amp; audio recording\u003c\/li\u003e\n  \u003cli\u003eAudio sampling \u0026amp; FFT frequency analysis\u003c\/li\u003e\n  \u003cli\u003eSound-reactive LED \u0026amp; light displays\u003c\/li\u003e\n  \u003cli\u003eArduino \u0026amp; Raspberry Pi audio input projects\u003c\/li\u003e\n  \u003cli\u003eRobotics and smart home automation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePackage Options\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eKY-038 (Sound Blue)\u003c\/li\u003e\n  \u003cli\u003eKY-037 (Sound Red)\u003c\/li\u003e\n  \u003cli\u003eMAX4466 Microphone Amplifier Breakout\u003c\/li\u003e\n  \u003cli\u003eMAX9814 AGC Microphone Amplifier Breakout\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLooking for other DIY electronics components and accessories? Check out our \u003ca href=\"\/products\/round-aluminum-wire-diy-jewelry-making-1mm-3mm\"\u003eRound Aluminum Wire for DIY Projects\u003c\/a\u003e or explore our \u003ca href=\"\/products\/glow-in-the-dark-natural-stone-round-beads-diy-jewelry-making\"\u003eGlow in the Dark Natural Stone Round Beads\u003c\/a\u003e for creative making projects.\u003c\/p\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.epa.gov\/recycle\/used-lithium-ion-batteries\" target=\"_blank\" rel=\"noopener\"\u003eEPA guidance on lithium-ion battery handling\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What is the difference between the MAX4466 and MAX9814 sound sensor modules?\u003c\/h4\u003e\n\u003cp\u003eA: The \u003cstrong\u003eMAX4466\u003c\/strong\u003e is a fixed-gain microphone amplifier with an adjustable trimmer pot (25x–125x gain), ideal for projects needing a simple, clean audio signal. The \u003cstrong\u003eMAX9814\u003c\/strong\u003e features built-in Automatic Gain Control (AGC) that automatically adjusts gain (40dB, 50dB, or 60dB) to handle varying sound levels — making it better suited for environments with changing audio intensity.\u003c\/p\u003e\n\u003ch4\u003eQ: Is this sound sensor module compatible with Arduino and Raspberry Pi?\u003c\/h4\u003e\n\u003cp\u003eA: Yes! All variants — MAX4466, MAX9814, KY-037, and KY-038 — are fully compatible with Arduino and Raspberry Pi. Simply connect VCC (2.4–5V), GND, and the output pin (AO or OUT) to your microcontroller's ADC input pin. No additional components are required for a basic connection.\u003c\/p\u003e\n\u003ch4\u003eQ: What projects can I build with the MAX4466 or MAX9814 sound sensor module?\u003c\/h4\u003e\n\u003cp\u003eA: These modules are excellent for a wide range of projects including voice changers, audio recording and sampling, FFT-based audio-reactive light displays, sound-activated triggers, robotics, and smart home automation systems. The analog output provides a real-time waveform, while the digital output (on KY-037\/KY-038) provides simple threshold-based triggering.\u003c\/p\u003e\n\u003ch4\u003eQ: What is the operating voltage range for these sound sensor modules?\u003c\/h4\u003e\n\u003cp\u003eA: The MAX4466 operates on \u003cstrong\u003e2.4V to 5V DC\u003c\/strong\u003e, the MAX9814 on \u003cstrong\u003e2.7V to 5.5V\u003c\/strong\u003e, and the KY-037\/KY-038 modules on \u003cstrong\u003e5V DC\u003c\/strong\u003e. For best audio performance on Arduino, the 3.3V supply rail is recommended for the MAX4466.\u003c\/p\u003e\n\u003c!-- production-packaging-notice --\u003e\n\u003ch3\u003eProduction \u0026amp; Packaging Notice\u003c\/h3\u003e\n\u003cp\u003eTo maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What is the difference between the MAX4466 and MAX9814 sound sensor modules?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The MAX4466 is a fixed-gain microphone amplifier with an adjustable trimmer pot (25x–125x gain), ideal for projects needing a simple, clean audio signal. 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