DIY 4-Digit LED Tube Clock Soldering Kit – DC 3.7V–5.5V

$12.90 $15.41

Build Your Own LED Digital Clock – Hands-On Soldering Kit

Bring electronics to life with this DIY 4-Digit LED Tube Clock Kit 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.

Made in Mainland China.

⚠️ Important Note: 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.

Key Specifications

Power Supply: DC 3.7V – 5.5V
Display: 0.44-inch red 7-segment digital tube (4-digit)
Main Chip: AT89C2051 microcontroller
PCB Thickness: 1.6mm military-grade FR-4 board
Time Accuracy: Error range of approximately 3 seconds per month
Recommended Power: DC adapter for long-term use (AA batteries drain faster)

Multi-Function Features

✅ Time Display: Hours and minutes, each independently adjustable
✅ Seconds Correction: Fine-tune time accuracy at any moment
✅ Clock Speed Tuning: 0–9 gear adjustment (default: gear 5)
✅ Dual Alarm Clock: Two independent alarms with individual on/off switches
✅ Hourly Chime: Toggleable hourly reminder function
✅ Countdown Timer: Up to 99 minutes; sounds alarm at completion
✅ Stopwatch: Start, pause, and reset functionality
✅ Counter Mode: Records button presses or external pulse counts

Why You'll Love This Kit

🔧 Simple assembly with a manageable component count — great for building confidence
📋 No post-assembly calibration required
🎓 Perfect as a learning project for electronics students and hobbyists
💡 High-contrast red LED display for easy reading
🏗️ Durable FR-4 PCB used in professional-grade electronics

Power Tip

For extended daily use, we recommend connecting a DC power supply (3.7V–5.5V) rather than AA batteries. While AA batteries work, they drain more quickly under continuous operation.

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Frequently Asked Questions

Q: Is this DIY LED clock kit suitable for beginners with no soldering experience?

A: 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.

Q: What power supply does this 4-digit LED clock kit require?

A: 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.

Q: How accurate is the clock once the DIY LED tube clock kit is assembled?

A: 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.

Q: What functions does this soldering assembly clock kit include beyond basic timekeeping?

A: 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.