{"product_id":"35mm-trs-audio-jack-stereo-socket-for-audio-electronics-projects","title":"3.5mm TRS Audio Jack – Stereo Socket for Audio Electronics Projects","description":"\u003ch1\u003e3.5mm TRS Audio Jack – Stereo Socket for Audio Electronics Projects\u003c\/h1\u003e\n\n\u003cp class=\"product-lede\"\u003eThe 3.5mm TRS audio jack is a stereo socket connector for adding wired audio input\/output to Arduino, ESP32, Raspberry Pi, and other DIY electronics projects.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable class=\"specs-table\"\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eConnector Type\u003c\/td\u003e\n\u003ctd\u003e3.5mm (1\/8″) TRS stereo jack socket\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eGender \/ Style\u003c\/td\u003e\n\u003ctd\u003eFemale, panel-mount or through-hole soldering\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eNumber of Pins\u003c\/td\u003e\n\u003ctd\u003e3 (Tip, Ring, Sleeve) or 5 with switch (variant dependent)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eContact Resistance\u003c\/td\u003e\n\u003ctd\u003e≤ 30 mΩ (typical)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eInsulation Resistance\u003c\/td\u003e\n\u003ctd\u003e≥ 100 MΩ at 500 V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRated Voltage \/ Current\u003c\/td\u003e\n\u003ctd\u003e30 V DC \/ 0.5 A\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMating Plug Diameter\u003c\/td\u003e\n\u003ctd\u003e3.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMounting Hole\u003c\/td\u003e\n\u003ctd\u003e~6 mm diameter (for panel mount)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eArduino Beginner:\u003c\/strong\u003e Build a simple tone generator using tone() and a capacitor filter to play melodies through headphones.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eESP32 IoT:\u003c\/strong\u003e Create a Wi‑Fi streaming radio player that outputs stereo sound via the onboard DAC to this socket.\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-pi-4-retro-gaming-console\"\u003e\n\u003cstrong\u003eRaspberry Pi Retro:\u003c\/strong\u003e Add a dedicated headphone jack for a RetroPie gaming console using PWM audio output on GPIO 18.\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-atl-breadboard-basics-lab-kit\"\u003e\n\u003cstrong\u003eCBSE\/ATL Lab:\u003c\/strong\u003e Assemble a transistor amplifier on a breadboard and use the socket to safely connect an external speaker.\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-esp32-s3-fft-audio-spectrum\"\u003e\n\u003cstrong\u003eB.Tech \/ Smart India Hackathon:\u003c\/strong\u003e Design a portable audio spectrum analyser with FFT algorithm, outputting live monitoring to a headphone jack.\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003ctable class=\"compat-table\"\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003ePlatform\u003c\/th\u003e\n\u003cth\u003eCompatible\u003c\/th\u003e\n\u003cth\u003eConnection\u003c\/th\u003e\n\u003cth\u003eLibrary \/ Method\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Uno R3\u003c\/td\u003e\n\u003ctd\u003eYes with condition\u003c\/td\u003e\n\u003ctd\u003ePin 5 or 6 (PWM) to Tip via capacitor\u003c\/td\u003e\n\u003ctd\u003etoneAC, direct PWM + RC filter\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Nano\u003c\/td\u003e\n\u003ctd\u003eYes with condition\u003c\/td\u003e\n\u003ctd\u003eD5 or D6 (PWM) to Tip via capacitor\u003c\/td\u003e\n\u003ctd\u003etoneAC, direct PWM + RC filter\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Mega 2560\u003c\/td\u003e\n\u003ctd\u003eYes with condition\u003c\/td\u003e\n\u003ctd\u003ePin 9 or 10 (PWM) to Tip via capacitor\u003c\/td\u003e\n\u003ctd\u003etoneAC, direct PWM + RC filter\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eESP8266 NodeMCU\u003c\/td\u003e\n\u003ctd\u003eYes with condition\u003c\/td\u003e\n\u003ctd\u003eI2S (D1, D2, D3) or PWM (D2)\u003c\/td\u003e\n\u003ctd\u003eESP8266Audio, I2S\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eESP32 Dev Board\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eGPIO25 (DAC1) or GPIO26 (DAC2) to Tip\/Ring\u003c\/td\u003e\n\u003ctd\u003eESP32 audio library, Audio.h\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRaspberry Pi Pico\u003c\/td\u003e\n\u003ctd\u003eYes with condition\u003c\/td\u003e\n\u003ctd\u003eGP0 to GP28 (PWM) with low pass filter\u003c\/td\u003e\n\u003ctd\u003epico-extras audio_pwm library\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRaspberry Pi 4 \/ 5\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eGPIO 18 (PWM0) via filter, or I2S\u003c\/td\u003e\n\u003ctd\u003ePiGPIO, WiringPi, ALSA\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWiring and Interface Notes\u003c\/h2\u003e\n\u003cp\u003eFor stereo output, connect the tip to the left audio channel and the ring to the right channel, sharing a common ground on the sleeve. Always place a 10–100 µF coupling capacitor in series with the signal line to block DC from microcontroller pins. When panel‑mounting, tighten the nut by hand plus a quarter‑turn with pliers – overtightening may crack the plastic body.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"faq\"\u003e\n  \u003cdiv class=\"faq-item\"\u003e\n    \u003ch3\u003eCan I connect Arduino output directly to this jack for headphones?\u003c\/h3\u003e\n    \u003cp\u003eNo, Arduino pins output 0 V\/5 V square waves. Add an RC low‑pass filter (e.g., 1 kΩ + 10 µF) and a coupling capacitor to produce safe audio levels.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"faq-item\"\u003e\n    \u003ch3\u003eIs this socket suitable for 3D printed enclosures?\u003c\/h3\u003e\n    \u003cp\u003eYes, the threaded barrel and nut are designed for panel mounting. Drill a 6 mm hole, solder wires first, then install the nut to avoid stress on the solder joints.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@graph\": [\n    {\n      \"@type\": \"Product\",\n      \"@id\": \"https:\/\/compoden.in\/products\/35mm-trs-audio-jack-stereo-socket-for-audio-electronics-projects#product\",\n      \"name\": \"3.5mm TRS Audio Jack – Stereo Socket for Audio Electronics Projects\",\n      \"description\": \"3.5mm TRS stereo audio jack socket for Arduino, ESP32, Raspberry Pi audio projects. Panel-mount female connector, 3-conductor, solder pins. For audio in\/out. 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