DIY 4-Digit LED Electronic Clock Soldering Kit

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

$17.89 $21.68

Build Your Own LED Clock – Fun DIY Soldering Kit for Electronics Enthusiasts

The LOTHYE 4-Digit LED Electronic Clock Kit is the perfect hands-on project for hobbyists, students, and electronics enthusiasts who want to sharpen their soldering and circuit assembly skills. Build a fully functional digital clock from scratch using quality through-hole components on a military-grade FR-4 PCB.

⚠️ Please Note: This kit is designed for buyers with prior electronics/soldering experience. We guarantee all components are in good condition before shipping, but successful assembly depends on the builder's skills. Please read all instructions carefully before beginning.

Key Specifications

Power Supply: DC 3.7V – 5.5V
Display: 0.44-inch red 4-digit LED tube (clock-dedicated)
Main Control Chip: Imported AT89C2051 microcontroller
PCB: 1.6mm thick military-grade FR-4 board
Timekeeping Accuracy: Approximately ±3 seconds per month
Power Tip: For long-term use, a DC power adapter is recommended over AA batteries to reduce power consumption

Functions & Features

✅ Time Display: Hours and minutes shown clearly on bright red LED digits
✅ Independent Adjustment: Hours and minutes can be set separately
✅ Seconds Correction: Fine-tune timekeeping accuracy at any time
✅ Speed Fine-Tune: Clock speed adjustable across 0–9 gears (default: gear 5)
✅ Dual Alarm Clock: Two independently switchable alarms
✅ Hourly Chime: Toggleable hourly reminder function
✅ Countdown Timer: Count down up to 99 minutes with end alarm
✅ Stopwatch: Full stopwatch with pause and clear functions
✅ Counter: Records button presses or external pulse counts

Why Choose This Kit?

🔧 Relatively low component count — beginner-friendly layout with a high assembly success rate
🔧 No debugging required after correct assembly
🔧 High-quality AT89C2051 chip for reliable and accurate performance
🔧 Great for learning PCB soldering, circuit theory, and microcontroller basics
🔧 Makes a fantastic gift for makers, engineering students, and DIY hobbyists

Made in Mainland China.

Learn more: OSHA guidance on hand and power tools

Frequently Asked Questions

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

A: This kit is best suited for buyers who already have basic electronics and soldering experience. The component count is relatively low and the PCB layout is straightforward, making it more accessible than advanced kits — but some prior knowledge of circuit assembly is recommended for a successful build.

Q: What power source does the 4-digit LED clock kit require?

A: The kit operates on DC 3.7V to 5.5V. It can run on 3 AA batteries for short-term use, but for extended operation a DC power adapter is strongly recommended to avoid rapid battery drain.

Q: Does the assembled clock kit come with all necessary components?

A: Yes, the kit includes all electronic components needed to complete the assembly, including the AT89C2051 microcontroller chip, the 4-digit red LED display tube, and the FR-4 PCB board. All parts are inspected and confirmed in good condition before shipping.

Q: What functions does this DIY electronic clock support beyond just showing the time?

A: Once assembled, the clock supports dual independent alarms, a countdown timer (up to 99 minutes), a stopwatch with pause and clear, an hourly chime, a pulse/button counter, and fine-tuning of clock speed across 10 gear levels — making it a multi-function electronic learning project.