{"title":"Adafruit PDM Microphone Breakout with JST SH Connector","handle":"adafruit-pdm-microphone-breakout-with-jst-sh-connector","url":"/products/adafruit-pdm-microphone-breakout-with-jst-sh-connector","description":"The Adafruit PDM Microphone Breakout with JST SH Connector provides a digital audio input using Pulse Density Modulation (PDM) in a compact, cable-ready form factor. The 4-pin JST SH connector (3V, GND, DAT, CLK) pairs with JST SH cables for flexible microphone placement away from the main board.\n\nPDM works by clocking the microphone at 1–3 MHz and reading a 1-bit digital output whose pulse density represents the analogue audio signal. When filtered and decimated, this produces clean audio samples. Most modern 32-bit processors (nRF52840, RP2040, SAMD51) include hardware PDM peripherals with library support. An on-board solder jumper lets you switch between Left and Right channel output.\n\nKey Features\n\n\nPDM Digital Output – 1-bit pulse density modulation, not analogue or I2S\n\nJST SH Connector – 4-pin cable-ready connector for flexible mic placement\n\nMEMS Microphone – Compact, high-quality digital microphone element\n\n1–3 MHz Clock Rate – Standard PDM clocking compatible with most 32-bit MCUs\n\nLeft/Right Channel Select – On-board solder jumper to choose channel\n\nNo Analogue Input Required – Fully digital interface, no ADC needed\n\n\nIntegration Approaches\n\n\nHardware PDM Peripheral – Best option: the MCU handles clocking, filtering, and decimation automatically (nRF52840, RP2040, SAMD51, etc.)\n\nHardware Peripheral + Manual Filtering – The MCU provides raw PDM data; you apply decimation and filtering in software\n\nAnalogue Filter Hack – Generate the clock externally, apply an analogue low-pass filter on the data line, and read the result as an analogue value\n\n\n\nTip: Check your platform's PDM support before purchasing. Most 32-bit ARM processors include hardware PDM peripherals, but 8-bit chips like AVR typically do not.\n\n\nIdeal For\n\nRemote microphone placement using JST SH cables\nVoice and audio capture on digital-only microcontrollers\nStereo mic arrays (pair two breakouts on Left and Right channels)\n\n\nAlso Consider\n\n\nPDM MEMS Microphone Breakout – Header version for breadboard use\n\n\nResources\n\n\nPDM Microphone Learn Guide (wiring, schematics, example code, datasheet)\n","vendor":"Adafruit","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":4942,"title":"Default Title","sku":"AF-4346","price":10.01,"on_sale":false,"in_stock":true,"available_quantity":100,"option1":"Default Title"}]}