{"product_id":"alps-ec25-srgp200200-hollow-shaft-rotary-encoder-20-position-volume-control","title":"ALPS EC25 SRGP200200 Hollow Shaft Encoder 20-Position Volume Knob","description":"\n\u003ch2\u003eALPS EC25 SRGP200200 10-Pulse Hollow Shaft Rotary Encoder — 20-Position Car Audio Volume Control Switch\u003c\/h2\u003e\n\u003cp\u003eUpgrade or replace your car audio volume control with this precision \u003cstrong\u003eALPS EC25 SRGP200200 Hollow Shaft Rotary Encoder\u003c\/strong\u003e. Featuring 10 pulses per revolution and 20 detent positions, this encoder delivers smooth, accurate volume adjustment for automotive head units, aftermarket stereos, and a wide range of electronics projects. Built to ALPS' renowned quality standards, it offers reliable tactile feedback and consistent performance — exactly what audiophiles and DIY electronics enthusiasts demand.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e ALPS EC25 SRGP200200\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Hollow shaft incremental rotary encoder\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePulse Count:\u003c\/strong\u003e 10 pulses per revolution\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePositions:\u003c\/strong\u003e 20 detent positions for precise control\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Car audio volume control, automotive electronics, DIY audio builds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Durable PVC construction\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e Brand new, high quality\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Includes:\u003c\/strong\u003e 1 × ALPS EC25 SRGP200200 Hollow Shaft Encoder\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy Choose This Rotary Encoder?\u003c\/h3\u003e\n\u003cp\u003eALPS is a globally recognized manufacturer of high-quality electronic components trusted by OEM automotive and consumer electronics brands worldwide. The EC25 series encoder is widely used in head units and audio mixing equipment for its long service life and smooth rotational feel. Whether you're repairing a factory stereo, building a custom car audio system, or prototyping an electronics project, this encoder is a drop-in solution that delivers professional-grade results.\u003c\/p\u003e\n\n\u003ch3\u003eCompatibility \u0026amp; Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCar stereo head units \u0026amp; infotainment systems\u003c\/li\u003e\n  \u003cli\u003eAftermarket audio amplifiers and receivers\u003c\/li\u003e\n  \u003cli\u003eDIY audio control panels\u003c\/li\u003e\n  \u003cli\u003eArduino, Raspberry Pi, and maker board projects\u003c\/li\u003e\n  \u003cli\u003eGeneral electronics volume\/parameter control\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eMade in Mainland China.\u003c\/p\u003e\n\n\u003ch3\u003eImportant Notes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eDue to manual measurement, please allow a tolerance of 1–3 mm.\u003c\/li\u003e\n  \u003cli\u003eColors may vary slightly from product images due to different monitor settings.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eExplore our \u003ca href=\"\/products\/1-percent-better-every-day-motivational-canvas-wall-art-print\"\u003e\"1% Better Every Day\" Motivational Canvas Wall Art Print\u003c\/a\u003e for workspace inspiration.\u003c\/li\u003e\n  \u003cli\u003eCheck out our \u003ca href=\"\/products\/best-seat-in-the-house-retro-quote-canvas-wall-art-print\"\u003e\"Best Seat In The House\" Retro Quote Canvas Wall Art Print\u003c\/a\u003e for your home or garage.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eExternal Resource\u003c\/h3\u003e\n\u003cp\u003eFor guidance on safe handling of electronic components in automotive applications, refer to the U.S. Consumer Product Safety Commission (CPSC) for consumer electronics safety information.\u003c\/p\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/en.wikipedia.org\/wiki\/Encoder\" target=\"_blank\" rel=\"noopener\"\u003eEncoder\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What is the ALPS EC25 SRGP200200 hollow shaft encoder used for?\u003c\/h4\u003e\n\u003cp\u003eA: The ALPS EC25 SRGP200200 is a rotary encoder primarily used as a volume control switch in car audio systems, automotive head units, and aftermarket stereos. It is also suitable for DIY electronics projects, Arduino\/Raspberry Pi builds, and any application requiring precise incremental rotary input with 20 detent positions.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What does \"10-pulse, 20-position\" mean for this encoder?\u003c\/h4\u003e\n\u003cp\u003eA: This means the encoder generates 10 electrical pulses per full 360° revolution, and has 20 physical detent (click) positions. Each detent step represents one increment of adjustment, giving you smooth, tactile control over volume or other parameters.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is this encoder compatible with my car stereo or head unit?\u003c\/h4\u003e\n\u003cp\u003eA: The ALPS EC25 SRGP200200 is a widely used standard component found in many OEM and aftermarket car audio head units. It is best to verify your specific unit's encoder specifications (shaft diameter, pin configuration, and pulse count) before ordering to ensure compatibility.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How many encoders are included in one order?\u003c\/h4\u003e\n\u003cp\u003eA: Each order includes 1 × ALPS EC25 SRGP200200 Hollow Shaft Rotary Encoder.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What is the ALPS EC25 SRGP200200 hollow shaft encoder used for?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The ALPS EC25 SRGP200200 is a rotary encoder primarily used as a volume control switch in car audio systems, automotive head units, and aftermarket stereos. 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