{"product_id":"lm317-adjustable-dc-power-supply-kit-diy-electronics","title":"LM317 Adjustable DC Power Supply Kit – DIY Electronics Teaching \u0026 Training","description":"\u003ch2\u003eLM317 Adjustable DC Power Supply DIY Kit — 1.25V–37V \/ 1.5A\u003c\/h2\u003e\u003cp\u003eThis \u003cstrong\u003eLM317 adjustable power supply DIY kit\u003c\/strong\u003e is a hands-on electronics teaching project that demonstrates linear voltage regulation using the classic \u003cstrong\u003eLM317T\u003c\/strong\u003e IC. Assemble the through-hole components to build a fully functional adjustable DC power supply with output from \u003cstrong\u003e1.25V to 37V at up to 1.5A\u003c\/strong\u003e — ideal for electronics labs, STEM education, and beginner makers.\u003c\/p\u003e\u003ch3\u003eKey Specifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRegulator IC\u003c\/td\u003e\n\u003ctd\u003eLM317T (TO-220)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Voltage Range\u003c\/td\u003e\n\u003ctd\u003e1.25V – 37V (adjustable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Current (Max)\u003c\/td\u003e\n\u003ctd\u003e1.5A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Voltage\u003c\/td\u003e\n\u003ctd\u003e3V – 40V DC (or AC with rectifier)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage Adjustment\u003c\/td\u003e\n\u003ctd\u003eOnboard potentiometer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Ripple\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;50mV typical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePCB Size\u003c\/td\u003e\n\u003ctd\u003e~60 × 40mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAssembly Type\u003c\/td\u003e\n\u003ctd\u003eThrough-hole DIY kit (unassembled)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eWhat You’ll Learn\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eHow linear voltage regulators work (LM317 operation principle)\u003c\/li\u003e\n\u003cli\u003eVoltage divider feedback for adjustable output: V\u003csub\u003eOUT\u003c\/sub\u003e = 1.25 × (1 + R2\/R1)\u003c\/li\u003e\n\u003cli\u003eCapacitor selection for input\/output filtering and stability\u003c\/li\u003e\n\u003cli\u003eHeatsink importance for thermal management at higher currents\u003c\/li\u003e\n\u003cli\u003eThrough-hole soldering technique and PCB assembly\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhy Choose This Kit?\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eClassic LM317 Circuit\u003c\/strong\u003e — Teaches fundamental voltage regulation used in millions of real-world designs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide Output Range\u003c\/strong\u003e — 1.25V–37V covers 3.3V, 5V, 9V, 12V, and custom voltages\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAll Components Included\u003c\/strong\u003e — LM317T, resistors, capacitors, potentiometer, PCB — ready to solder\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact PCB\u003c\/strong\u003e — 60×40mm fits in project enclosures\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIdeal for Teaching\u003c\/strong\u003e — Clear silkscreen labels for easy component placement\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTypical Applications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eElectronics classroom voltage regulation lab exercise\u003c\/li\u003e\n\u003cli\u003eAdjustable bench power supply for low-current projects\u003c\/li\u003e\n\u003cli\u003eVariable voltage source for LED brightness control\u003c\/li\u003e\n\u003cli\u003eCharging regulator for NiMH\/NiCd battery packs\u003c\/li\u003e\n\u003cli\u003eMaker space beginner soldering project\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eQ: Does this kit include a transformer or AC input?\u003c\/strong\u003e\u003cbr\u003eA: No — the kit requires a DC input (3V–40V). Use an existing DC power supply or add a bridge rectifier + filter capacitor for AC input.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: Can LM317 output 5V from a 12V input?\u003c\/strong\u003e\u003cbr\u003eA: Yes — set R1=240Ω, R2=720Ω for 5V output. The LM317 dissipates (12−5)×I as heat — use a heatsink above 500mA.\u003c\/p\u003e\u003ch3\u003ePackage Contents\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e1× PCB\u003c\/li\u003e\n\u003cli\u003e1× LM317T TO-220 Regulator IC\u003c\/li\u003e\n\u003cli\u003eResistors, capacitors, potentiometer (all values per BOM)\u003c\/li\u003e\n\u003cli\u003eTerminal blocks for input\/output connections\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Keszoox","offers":[{"title":"Default Title","offer_id":46991487697131,"sku":"\u003cnone\u003e","price":15.92,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/1005\/8731\/files\/lm317-adjustable-dc-power-kit.webp?v=1761536959","url":"https:\/\/keszoox.com\/products\/lm317-adjustable-dc-power-supply-kit-diy-electronics","provider":"Keszoox","version":"1.0","type":"link"}