{"product_id":"diy-led-4-digit-tube-clock-soldering-kit-electronic-assembly","title":"DIY 4-Digit LED Tube Clock Soldering Kit – DC 3.7V–5.5V","description":"\u003ch2\u003eBuild Your Own LED Digital Clock – Hands-On Soldering Kit\u003c\/h2\u003e\n\u003cp\u003eBring electronics to life with this \u003cstrong\u003eDIY 4-Digit LED Tube Clock Kit\u003c\/strong\u003e from LOTHYE. Ideal for electronics hobbyists, students, and makers, this fun soldering assembly project lets you construct a fully functional digital clock from individual components. With a high-quality PCB, a reliable AT89C2051 microcontroller, and a bright red 7-segment display, this kit is designed to be beginner-friendly while offering impressive multi-function features once assembled.\u003c\/p\u003e\n\n\u003cp\u003e\u003cem\u003eMade in Mainland China.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003e⚠️ Important Note:\u003c\/strong\u003e This kit is intended for buyers with basic circuit soldering experience. Success depends on your familiarity with electronic assembly. Please read the full product description carefully before purchasing. The seller guarantees components are in good condition prior to shipment.\u003c\/p\u003e\n\n\u003ch3\u003eKey Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePower Supply:\u003c\/strong\u003e DC 3.7V – 5.5V\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDisplay:\u003c\/strong\u003e 0.44-inch red 7-segment digital tube (4-digit)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMain Chip:\u003c\/strong\u003e AT89C2051 microcontroller\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePCB Thickness:\u003c\/strong\u003e 1.6mm military-grade FR-4 board\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTime Accuracy:\u003c\/strong\u003e Error range of approximately 3 seconds per month\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRecommended Power:\u003c\/strong\u003e DC adapter for long-term use (AA batteries drain faster)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eMulti-Function Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eTime Display:\u003c\/strong\u003e Hours and minutes, each independently adjustable\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eSeconds Correction:\u003c\/strong\u003e Fine-tune time accuracy at any moment\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eClock Speed Tuning:\u003c\/strong\u003e 0–9 gear adjustment (default: gear 5)\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eDual Alarm Clock:\u003c\/strong\u003e Two independent alarms with individual on\/off switches\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eHourly Chime:\u003c\/strong\u003e Toggleable hourly reminder function\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eCountdown Timer:\u003c\/strong\u003e Up to 99 minutes; sounds alarm at completion\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eStopwatch:\u003c\/strong\u003e Start, pause, and reset functionality\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eCounter Mode:\u003c\/strong\u003e Records button presses or external pulse counts\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy You'll Love This Kit\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e🔧 Simple assembly with a manageable component count — great for building confidence\u003c\/li\u003e\n  \u003cli\u003e📋 No post-assembly calibration required\u003c\/li\u003e\n  \u003cli\u003e🎓 Perfect as a learning project for electronics students and hobbyists\u003c\/li\u003e\n  \u003cli\u003e💡 High-contrast red LED display for easy reading\u003c\/li\u003e\n  \u003cli\u003e🏗️ Durable FR-4 PCB used in professional-grade electronics\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePower Tip\u003c\/h3\u003e\n\u003cp\u003eFor extended daily use, we recommend connecting a \u003cstrong\u003eDC power supply\u003c\/strong\u003e (3.7V–5.5V) rather than AA batteries. While AA batteries work, they drain more quickly under continuous operation.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products You May 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\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 DIY LED clock kit suitable for beginners with no soldering experience?\u003c\/h4\u003e\n\u003cp\u003eA: This kit is best suited for those with some basic soldering and circuit assembly experience. The component count is manageable and the PCB is clearly laid out, making it one of the more approachable DIY electronic kits available — but a basic understanding of circuit soldering is recommended before attempting assembly.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What power supply does this 4-digit LED clock kit require?\u003c\/h4\u003e\n\u003cp\u003eA: The kit operates on DC 3.7V to 5.5V. It can run on standard AA batteries, but for long-term continuous use a dedicated DC power adapter is strongly recommended, as batteries will deplete more quickly under sustained operation.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How accurate is the clock once the DIY LED tube clock kit is assembled?\u003c\/h4\u003e\n\u003cp\u003eA: The assembled clock keeps very accurate time, with a typical error range of only around 3 seconds per month. The kit also includes a seconds-correction function and a 0–9 gear speed-tuning feature so you can fine-tune the timekeeping after assembly.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What functions does this soldering assembly clock kit include beyond basic timekeeping?\u003c\/h4\u003e\n\u003cp\u003eA: In addition to standard hours-and-minutes display, the kit supports dual independent alarm clocks, a toggleable hourly chime, a 99-minute countdown timer with end alarm, a stopwatch (with pause and reset), and a counter mode that can record button presses or external pulse counts.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Is this DIY LED clock kit suitable for beginners with no soldering experience?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This kit is best suited for those with some basic soldering and circuit assembly experience. 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