{"product_id":"ac-power-adapter-7-5v-dc-1a-5-5x2-1mm-barrel-universal-100-240v","title":"AC Power Adapter 7.5V DC 1A — 5.5×2.1mm Barrel, Universal 100–240V AC Input, Right-Angle Plug","description":"\u003ch2\u003eAC Power Adapter — 7.5V DC \/ 1A, Universal Input, 5.5×2.1mm Barrel Plug\u003c\/h2\u003e\n\n\u003cp\u003eThe \u003cstrong\u003e7.5V DC 1A AC power adapter\u003c\/strong\u003e is the optimal power supply for breadboard power supply modules, Arduino boards, and any project using linear voltage regulators in the 3.3V–6V output range. The 7.5V output voltage is deliberately chosen: it provides enough headroom for 5V linear regulators (7805, AMS1117-5.0) to regulate cleanly, while minimizing the voltage drop across the regulator — reducing heat dissipation and allowing the regulator to deliver more current safely compared to a 9V or 12V adapter.\u003c\/p\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eright-angle slim housing\u003c\/strong\u003e mounts parallel to the wall outlet or power strip, occupying only one socket position instead of blocking adjacent outlets. Universal \u003cstrong\u003e100–240V AC input\u003c\/strong\u003e works worldwide without adapters.\u003c\/p\u003e\n\n\u003ch3\u003eKey Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInput Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e100–240V AC, 50\/60Hz (universal)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOutput Voltage (nominal)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e7.5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOutput Voltage (measured)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e7.6V no load → 7.4V @ 500mA → 7.2V @ 1A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOutput Current (max)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1A continuous\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOutput Ripple\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e100–300mV (varies with load)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSwitching Frequency\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e~62kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEfficiency\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e~76% typical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDC Plug\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5.5mm O.D. × 2.1mm I.D. barrel (center positive)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCable Length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e105cm (42″)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHousing\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRight-angle slim, saves outlet space\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e73 × 26 × 43mm (2.9″ × 1″ × 1.7″)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower LED\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eGreen LED indicator when AC power applied\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhy 7.5V Instead of 9V or 12V?\u003c\/h3\u003e\n\u003cp\u003eLinear voltage regulators dissipate power as heat: \u003cstrong\u003eP = (Vin – Vout) × Iout\u003c\/strong\u003e. With a 9V adapter powering a 5V regulator at 500mA: P = (9–5) × 0.5 = \u003cstrong\u003e2W of heat\u003c\/strong\u003e. With a 7.5V adapter: P = (7.5–5) × 0.5 = \u003cstrong\u003e1.25W\u003c\/strong\u003e — a 37% reduction in heat. This means the regulator runs cooler, can deliver more current without a heatsink, and the overall system is more efficient. For breadboard power supply modules (MB102, YwRobot) and Arduino boards with onboard 5V regulators, 7.5V is the ideal input voltage.\u003c\/p\u003e\n\n\u003ch3\u003eTypical Applications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBreadboard power supply modules\u003c\/strong\u003e (MB102, YwRobot, HW-131) — optimal input voltage for 3.3V and 5V output\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eArduino Uno, Mega, and Leonardo\u003c\/strong\u003e — powers via DC barrel jack, onboard regulator runs cooler than with 9V\/12V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLinear regulator projects\u003c\/strong\u003e (7805, 7806, AMS1117) — minimizes regulator heat dissipation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRaspberry Pi via barrel-to-USB adapter\u003c\/strong\u003e — with appropriate step-down converter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSensor and IoT node power supply\u003c\/strong\u003e — clean regulated 7.5V input for onboard regulators\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eElectronics lab bench supply\u003c\/strong\u003e — general-purpose 7.5V \/ 1A regulated DC source\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e5.5×2.1mm center-positive barrel plug\u003c\/strong\u003e is the most common DC power connector standard, compatible with Arduino Uno\/Mega DC jacks, MB102 breadboard power supplies, most DC-DC converter modules, and the majority of electronics project enclosures and development boards worldwide.\u003c\/p\u003e\n\n\u003ch3\u003ePackage Contents\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1 × AC Power Adapter 7.5V DC \/ 1A (5.5×2.1mm barrel, right-angle plug, 105cm cable)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Keszoox","offers":[{"title":"Default Title","offer_id":45680422519019,"sku":"","price":12.37,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/1005\/8731\/files\/AC-Adapter-7.5V-1A_1ece6019-f535-4bae-b8dd-d93dd78c04be.jpg?v=1723006465","url":"https:\/\/keszoox.com\/products\/ac-power-adapter-7-5v-dc-1a-5-5x2-1mm-barrel-universal-100-240v","provider":"Keszoox","version":"1.0","type":"link"}