{"product_id":"smd-soldering-practice-kit-ne555-cd4017-rotating-led-board","title":"SMD Soldering Practice Kit – NE555 CD4017 Rotating LED Board","description":"\n\u003ch2\u003eLOTHYE SMD Soldering Practice Board Kit – NE555 \u0026amp; CD4017 Rotating Flashing LED Circuit\u003c\/h2\u003e\n\u003cp\u003eTake your electronics skills to the next level with this comprehensive DIY SMD Component Soldering Practice Kit. Designed for electronics enthusiasts, students, hobbyists, and circuit repair learners, this dual-board kit delivers hands-on SMT soldering experience with real-world circuit components and professional-grade PCB construction.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003e⚠️ Please Note:\u003c\/strong\u003e This kit is intended for individuals with prior circuit assembly experience. We guarantee the product is in perfect condition upon delivery; successful assembly depends on the builder's soldering skills and circuit knowledge. Please read all product details carefully before purchasing.\u003c\/p\u003e\n\n\u003cp\u003eMade in Mainland China.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cp\u003eThis kit contains \u003cstrong\u003etwo practice boards\u003c\/strong\u003e, each targeting different skill levels and component types:\u003c\/p\u003e\n\n\u003ch4\u003eBoard 1: Rotating LED (Running Water Lamp) Practice Board\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBoard Size:\u003c\/strong\u003e 89 × 58 mm | \u003cstrong\u003eThickness:\u003c\/strong\u003e 1.6 mm\u003c\/li\u003e\n  \u003cli\u003eInternational standard PCB with all tin-plated pads\u003c\/li\u003e\n  \u003cli\u003eHigh-strength, fireproof, and anti-drop material — disassembles and reassembles repeatedly\u003c\/li\u003e\n  \u003cli\u003eLeft and right side columns feature SMD component welding practice zones, each with dedicated test points\u003c\/li\u003e\n  \u003cli\u003eCentral circuit is a \u003cstrong\u003erunning water (sequential) LED lamp circuit\u003c\/strong\u003e built around the \u003cstrong\u003eCD4017 decade counter\u003c\/strong\u003e and \u003cstrong\u003eNE555 timer IC\u003c\/strong\u003e — fully functional after correct assembly\u003c\/li\u003e\n  \u003cli\u003eWorking voltage: \u003cstrong\u003e3V to 12V DC\u003c\/strong\u003e\n\u003c\/li\u003e\n  \u003cli\u003eReverse side includes a handy component ruler and PCB trace reference examples for design study\u003c\/li\u003e\n  \u003cli\u003e\u003cem\u003eNote: Back-side symbols are for reference only — no soldering required on the back, and back-side components are not included.\u003c\/em\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eBoard 2: HKT002 Full-Process SMD Training Board\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBoard Size:\u003c\/strong\u003e 70 × 57 mm | \u003cstrong\u003eThickness:\u003c\/strong\u003e 1.6 mm\u003c\/li\u003e\n  \u003cli\u003eFR-4 substrate with blue solder mask and fully tin-plated pads\u003c\/li\u003e\n  \u003cli\u003eHigh-strength, fireproof, anti-drop construction — suitable for repeated assembly practice\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e149 SMD components\u003c\/strong\u003e across \u003cstrong\u003e10 component categories\u003c\/strong\u003e, with 129 pieces to be soldered and \u003cstrong\u003e444 solder joints\u003c\/strong\u003e\n\u003c\/li\u003e\n  \u003cli\u003eMatches competition-level circuit board standards — ideal for skills assessments and training programs\u003c\/li\u003e\n  \u003cli\u003eCorresponding test points provided for each component section for easy verification\u003c\/li\u003e\n  \u003cli\u003eIncludes LQFP44 IC package for advanced SMT package practice\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eWhy Choose This Kit?\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eDual-board set\u003c\/strong\u003e — beginner LED circuit + advanced full-process competition board\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eRealistic SMD components\u003c\/strong\u003e — resistors, capacitors, diodes, ICs, and more\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eProfessional PCB quality\u003c\/strong\u003e — tinned pads, FR-4 material, clear silkscreen labeling\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eFunctional output\u003c\/strong\u003e — complete the LED board correctly and watch it light up!\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eTest points throughout\u003c\/strong\u003e — troubleshoot and verify each section with ease\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eGreat for education\u003c\/strong\u003e — schools, maker spaces, technical colleges, and self-learners\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eRotating LED Board\u003c\/th\u003e\n\u003cth\u003eHKT002 Board\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eBoard Size\u003c\/td\u003e\n\u003ctd\u003e89 × 58 mm\u003c\/td\u003e\n\u003ctd\u003e70 × 57 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003ePCB Thickness\u003c\/td\u003e\n\u003ctd\u003e1.6 mm\u003c\/td\u003e\n\u003ctd\u003e1.6 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eInternational Standard PCB\u003c\/td\u003e\n\u003ctd\u003eFR-4 Tinned\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eSMD Components\u003c\/td\u003e\n\u003ctd\u003eCommon SMD types\u003c\/td\u003e\n\u003ctd\u003e149 (10 categories)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eSolder Joints\u003c\/td\u003e\n\u003ctd\u003eMultiple practice zones\u003c\/td\u003e\n\u003ctd\u003e444\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e3V – 12V DC\u003c\/td\u003e\n\u003ctd\u003eN\/A (training board)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eKey ICs\u003c\/td\u003e\n\u003ctd\u003eNE555, CD4017\u003c\/td\u003e\n\u003ctd\u003eLQFP44 package\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eRelated Products You Might Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/electromagnetic-induction-tester-coil-motherboard-fault-detector\"\u003eElectromagnetic Induction Tester – Coil \u0026amp; Circuit Fault Detector\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/air-compressor-pressure-gauge-0-10-0-12-0-25-bar-hydraulic-diy\"\u003eAir Compressor Pressure Gauge 0-10\/0-12\/0-25 Bar | DIY Tool\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/18-pc-basswood-carving-blocks-whittling-wood-kit\"\u003e18 Pc Basswood Carving Blocks – Whittling Wood Kit for Carvers\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/hand-power-tools\" target=\"_blank\" rel=\"noopener\"\u003eOSHA guidance on hand and power tools\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: Is this SMD soldering practice kit suitable for beginners?\u003c\/h4\u003e\n\u003cp\u003eA: This kit is best suited for individuals who already have some experience with circuit assembly and soldering. The Rotating LED board is more approachable for intermediate beginners, while the HKT002 board with 149 SMD components and 444 solder joints is designed for advanced practice. We recommend having basic soldering tools and circuit knowledge before starting.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What tools do I need to assemble the SMD soldering practice board?\u003c\/h4\u003e\n\u003cp\u003eA: You will need a fine-tip soldering iron (ideally temperature-controlled), SMD-compatible solder (0.3–0.5 mm recommended), flux, tweezers, and a multimeter for testing. A magnifying glass or microscope is also highly recommended for working with small SMD components like the LQFP44 IC package.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Does the Rotating LED board actually light up after assembly?\u003c\/h4\u003e\n\u003cp\u003eA: Yes! Once the NE555 timer and CD4017 decade counter ICs are correctly soldered along with the LED components, the central circuit will produce a sequential running light effect. Simply power it with a 3V to 12V DC supply to see it in action.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Are the components included or do I need to purchase them separately?\u003c\/h4\u003e\n\u003cp\u003eA: This is a kit that includes the PCB boards and SMD components for the front-side circuit. Please note that components printed on the back side of the Rotating LED board are for reference only and are NOT included — no soldering is required on the back.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Is this SMD soldering practice kit suitable for beginners?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This kit is best suited for individuals who already have some experience with circuit assembly and soldering. 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