{"product_id":"0-30v-adjustable-dc-regulated-power-supply-diy-kit-0-3a-current-limiting","title":"0–30V Adjustable DC Regulated Power Supply DIY Kit — 0–3A, Current Limiting, Short Circuit Protection","description":"\u003ch2\u003e0–30V Adjustable DC Regulated Power Supply DIY Kit — 0–3A, Current Limiting, Short Circuit Protection\u003c\/h2\u003e\u003cp\u003eThis \u003cstrong\u003e0–30V \/ 0–3A adjustable DC regulated power supply DIY kit\u003c\/strong\u003e is a complete through-hole soldering project that produces a professional-grade linear bench power supply. With continuously adjustable voltage from 0V to 30V and current limiting from 0A to 3A, it provides the two most essential controls for safe electronics development — voltage setting and current limiting to protect circuits under test. The linear regulation topology delivers ultra-low ripple (0.01%) and excellent load regulation, making it superior to switching power supplies for sensitive analog and RF circuit testing.\u003c\/p\u003e\u003ch3\u003eKey Specifications\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Voltage\u003c\/td\u003e\n\u003ctd\u003e0V – 30V DC (continuously adjustable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Current\u003c\/td\u003e\n\u003ctd\u003e0A – 3A (continuously adjustable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Voltage\u003c\/td\u003e\n\u003ctd\u003e24V AC (transformer required, not included)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRipple \u0026amp; Noise\u003c\/td\u003e\n\u003ctd\u003e≤0.01% (linear regulation)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage Regulation\u003c\/td\u003e\n\u003ctd\u003e≤0.01%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent Limiting\u003c\/td\u003e\n\u003ctd\u003eYes (adjustable, LED indicator)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShort Circuit Protection\u003c\/td\u003e\n\u003ctd\u003eYes (auto-recovery)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDisplay\u003c\/td\u003e\n\u003ctd\u003eDual LED voltmeter + ammeter (optional)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eKit Type\u003c\/td\u003e\n\u003ctd\u003eThrough-hole DIY soldering kit (PCB + components)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eLinear vs Switching Power Supply — Which to Choose?\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eLinear (This Kit)\u003c\/th\u003e\n\u003cth\u003eSwitching PSU\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eRipple \u0026amp; Noise\u003c\/td\u003e\n\u003ctd\u003e≤0.01% (ultra-low)\u003c\/td\u003e\n\u003ctd\u003eHigher (switching noise)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEfficiency\u003c\/td\u003e\n\u003ctd\u003e30–60%\u003c\/td\u003e\n\u003ctd\u003e80–95%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeat Generation\u003c\/td\u003e\n\u003ctd\u003eHigher (pass transistor)\u003c\/td\u003e\n\u003ctd\u003eLower\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBest For\u003c\/td\u003e\n\u003ctd\u003eAnalog, RF, audio circuits\u003c\/td\u003e\n\u003ctd\u003eDigital, high-power loads\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransient Response\u003c\/td\u003e\n\u003ctd\u003eExcellent\u003c\/td\u003e\n\u003ctd\u003eGood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eWhat You Learn Building This Kit\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLinear voltage regulation\u003c\/strong\u003e — how pass transistors and op-amp feedback control output voltage\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCurrent limiting circuit\u003c\/strong\u003e — how to implement adjustable current limiting with LED indication\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThrough-hole soldering\u003c\/strong\u003e — resistors, capacitors, transistors, op-amps, and transformers\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower supply design\u003c\/strong\u003e — rectification, filtering, and regulation stages\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShort circuit protection\u003c\/strong\u003e — auto-recovery protection circuit design\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhy Choose This DIY Power Supply Kit?\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e✅ \u003cstrong\u003e0–30V \/ 0–3A full range\u003c\/strong\u003e — covers all common electronics bench supply requirements\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003e0.01% ripple\u003c\/strong\u003e — ultra-clean output for sensitive analog and RF circuits\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eAdjustable current limiting\u003c\/strong\u003e — protects circuits under test from overcurrent damage\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eShort circuit protection\u003c\/strong\u003e — auto-recovery, no fuse replacement needed\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eDIY soldering kit\u003c\/strong\u003e — educational project with practical bench tool outcome\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTypical Applications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eElectronics bench power supply for circuit development\u003c\/li\u003e\n\u003cli\u003eBattery charging with adjustable voltage and current\u003c\/li\u003e\n\u003cli\u003eLED driver testing with current limiting\u003c\/li\u003e\n\u003cli\u003eAnalog and RF circuit testing (ultra-low ripple)\u003c\/li\u003e\n\u003cli\u003eElectronics education and soldering practice\u003c\/li\u003e\n\u003cli\u003eMaker and hobbyist lab power supply\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003ePackage Contents\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e1 × PCB with all through-hole components (resistors, capacitors, transistors, op-amps, potentiometers)\u003c\/li\u003e\n\u003cli\u003e\u003cem\u003e24V AC transformer and enclosure not included\u003c\/em\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Keszoox","offers":[{"title":"Default Title","offer_id":46991450636523,"sku":"\u003cnone\u003e","price":21.52,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/1005\/8731\/files\/0-30v-adjustable-dc-regulated-power-supply-diy-kit-current-limiting-protection.webp?v=1761801197","url":"https:\/\/keszoox.com\/products\/0-30v-adjustable-dc-regulated-power-supply-diy-kit-0-3a-current-limiting","provider":"Keszoox","version":"1.0","type":"link"}