• Digital Clock Electronics STEM Kit assembled
  • Digital Clock Electronics STEM Kit components
  • 4-digit clock electronics kit components Printed Circuit Board
  • 4-digit clock electronics kit components STC15W408AS MCU
  • 4-digit clock electronics kit components 7 segment LED display block
  • 4-digit clock electronics kit components DS1302 Trickle-Charge Timekeeping Chip
  • 4-digit clock electronics kit components 32.768kHz Oscillating Crystal
  • 4-digit clock electronics kit components Light dependent resistor
  • 4-digit clock electronics kit components 22 pF ceramic capacitor
  • 4-digit clock electronics kit components 104 ceramic capacitor
  • 4-digit clock electronics kit components Glass encapsulated NTC thermistor
  • 4-digit clock electronics kit components S8550 transistors
  • 4-digit clock electronics kit components 10 Kohm metal film resistor
  • 4-digit clock electronics kit components 330 ohm metal film resistor
  • 4-digit clock electronics kit components Side mount tactile switch
  • 4-digit clock electronics kit components Buzzer
  • 4-digit clock electronics kit components DIP-8 IC socket
  • 4-digit clock electronics kit components DIP-28 IC socket
  • 4-digit clock electronics kit components USB to DC cable
  • 4-digit clock electronics kit components 3V Battery retainer clip
  • 4-digit clock electronics kit components DC power socket
  • 4-digit clock electronics kit components Acrylic case
  • 4-digit clock electronics kit components anti-glare film
  • 4-digit clock electronics kit components Phillips self-tapping screws
  • Digital Clock DIY Electronics kit main image with information
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4-Digit Digital Clock kit

$25.95
$25.95
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Build a digital clock...

and learn real electronics while you do it!

The 4-Digit Digital Clock Kit is a hands-on electronics project that combines fun with learning real-world skills. It's perfect for any age from 12 and up, it makes a brilliant gift for young kid engineers, teens who love to build, and adults that have a passion for electronics and DIY.

Assemble your own fully functioning clock that not only tells the time but also adjusts brightness automatically (becoming brighter in well lit rooms and less bright in the dark), measures room temperature, and includes alarm and chime features.

Whether you’re building for fun, education, or giving it as a gift, this project brings science, electronic circuits, and sheer satisfaction together. From learning to solder to understanding how digital timekeeping works, it’s a great introduction to electronics and a proud build to display.

Refer to each of the drop-down sections below for further information.

What's Included?

Includes all components required to build the digital clock:

  • 4x 7-segment LED display blocks
  • STC15W408AS microcontroller
  • DS1302 RTC chip with trickle-charge
  • 32.768kHz crystal oscillator
  • Light-dependent resistor (LDR)
  • Thermistor (temperature sensor)
  • Multiple capacitors
  • Multiple resistors
  • Multiple transistors
  • 2x Tactile switches
  • 5V buzzer
  • IC sockets (DIP-8 and DIP-28)
  • USB to DC power cable
  • 3V battery holder
  • DC power socket
  • Acrylic case
  • Screws and mounting hardware
  • Printed Circuit Board (PCB)

Learning Outcomes and Benefits

Fundamentals of Electronics: Understand how electronic components like resistors, capacitors, LEDs, and transistors work together to form circuits.

Digital Displays: Learn how LED digital display blocks show time and data from a microcontroller.

Sensor Technology: Discover how light (LDR) and temperature (NTC thermistor) sensors interact with real-world data and control outputs.

Timekeeping Principles: Explore real-time clocks (RTC) and how they maintain accurate time—even during power loss.

Soldering Skills: Gain valuable hands-on experience with through-hole soldering—a must-have for any electronics hobbyist or aspiring engineer.

Troubleshooting & Logic: Practice systematic problem-solving and critical thinking while assembling and debugging the clock.

Manual Inputs: Learn how tactile switches and buttons work to control functions like setting time, alarms, or toggling features.

Printed Circuit Boards (PCBs): Understand how components are laid out and connected in compact, efficient ways for reliable operation.

Frequently Asked Questions (FAQ)

Q: Is this kit suitable for beginners?
A: Yes, especially those with some basic electronics or soldering experience (which they may have gotten from school). Teens or adults completely new to soldering can still complete it by simply following our detailed step-by-step instruction manual.

Q: Does the kit come pre-assembled?
A: No, it’s a full DIY kit. You’ll build it from the ground up and enjoy the satisfaction of telling everyone that sees it that you built it yourself!

Q: Does the instruction manual include a circuit diagram and explanation of how it works?
A: Yes, our instruction manual contains a circuit diagram, a description of the electronics that make the clock work, and lots of other educational content!

Q: How accurate is the timekeeping?
A: This digital clock includes a 32.768 KHz crystal oscillator, similar to that found in many quality wristwatches. Along with the trickle-charge timekeeping chip, it generates a very stable signal that ensures consistent timekeeping.

In normal conditions of humidity and temperature, drift is expected to be ±1 to 2 seconds per day, or less than 1 minute per month. For a DIY electronics build, that’s excellent performance!

Q: How is the brightness adjusted?
A: The light sensor (LDR) detects the light level in the room and then sends a signal to the microcontroller to decrease or increase the power to the LED display, which causes it to dim or brighten.

Q: Will the clock keep time if unplugged?
A: Yes! It uses a backup coin battery and real-time clock (RTC) chip to maintain time during power loss.

Q: Is it a good gift for teenagers or adults?
A: Absolutely! It’s a rewarding and educational gift for anyone who loves STEM, DIY, or electronics—regardless of age.

Product Specifications

Dimensions (approx., when completed):

  • Height: 4cm
  • Width: 11.5 cm
  • Depth: 3.2 cm

Display: 4-digit 7-segment LED blocks
Microcontroller: STC15W408AS
RTC chip: DS1302 with battery backup
Sensors:

  • Light: LDR
  • Temperature: NTC thermistor

Power: USB to DC power cable
Chime & Alarm: User-configurable
Enclosure: Acrylic case with self-tapping screws

Recommended Age: 12+
Difficulty: Intermediate
Assembly Time: 2–4 hours

Assembly and Usage Info

Anyone can build this digital clock kit following our detailed step-by-step instruction manual which can be downloaded from the link below. The password to open the manual was sent to the same email that you placed your order from. Can't find it? Just Contact Us!

Download: 4-Digit Digital Clock kit Instruction Manual

Skill Level: Intermediate
Age Rating: 12+ (adult supervision required for younger builders)
Assembly Time: Typically 2–4 hours
Power Source: USB power cable (included) with a back-up CR2032 battery (not included).

Tools and Materials Required

Tools required for this kit

  • Soldering iron
  • Solder wire

We sell these items as a bundle for just €25.95 (or currency equivalent) which saves 10 percent! Just click the link below to select your countries plug type and add to your order.

SOLDERING IRON & WIRE BUNDLE

Of course, you only need to buy the tools once; you'll use them again and again for your future electronics projects!

Links and References

Our blogs & videos related to electronics kits:

Ultimate Guide to Electronics Kits

STEM Electronics as a Hobby

Youtube video: Tools, tips and tricks for soldering electronics kits

Other useful links:

How 7-segment displays work

What is a real time clock?

Shipping and Warranty Info

Shipping Information

Orders are processed and dispatched within 1–2 business days. Typical delivery times for this product, depending on region are:

  • EU: 7-14 days
  • UK: 5-12 days
  • US / Canada: 6-11 days
  • Australia: 7-14 days

All orders are shipped with tracking, where available. Please refer to our Shipping Policy page for further detail.

Warranty & Satisfaction Guarantee

All electronics kits come with a 14-day satisfaction guarantee. If you're not happy with your purchase, contact us and we’ll arrange a refund or replacement — no hassle. Please note that to qualify for a replacement or refund, kits must be in their original, unused condition. Please refer to our Returns and Refunds policy for more information.

Packaging

We aim to minimize waste while protecting your order. All electronic kits are securely packaged in padded mailing bags containing anti-static ESD bags and/or rigid plastic boxes (depending on the product) to ensure the safety of the electronic components. An example of electronics kit packaging can be viewed HERE. If you're purchasing this item as a gift and would rather that it was in a box, we also sell quality gift boxes at the following link: Quality Gift boxes.


Ships from: International Warehouse

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Customer Reviews

Based on 10 reviews
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Fergus Mc Carthy
Excellent piece of kit

From the moment I ordered the Digital electronic Clock to the day it was delivered was relatively fast. The instructions, of both the PDF and YouTube, made it real easy to assemble and it worked first time. The next kit I'm going to order is the FM Radio.

Hello Fergus, thank you so much for taking the time to leave this review, we really appreciate it. Delighted to hear you were happy with your clock kit and with our service and well done on a successful build. The FM radio kit is a nice next project—feel free to reach out to our customer support on info@thesciencehut.com if you have and questions before making a decision to go for it.

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Anonymous
Digital Clock

Bought this to do with my 7yr old grandson. With a bit of guidance from me he soldered it and put it together in its box. Worked first time, very happy grandson!

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Hi Peter, thank you so much for taking the time to review this kit, we really appreciate it. Well done to your grandson (and yourself) on a successful build—really impressed that he managed to solder this together at only 7 years old! He's done a super neat job of it too!

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Ned Thanhouser
Built 4-digit clock...works perfectly!

My first project with Science Hut, assembly instructions clear, operating instructions a bit confusing but I figured it out. Next up: USB speaker.

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Hi Ned, thank you very much for taking the time to leave this review, we really appreciate it. Glad that you figure out the set-up... it isn't very intuitive with only two buttons to control so many functions... if you have any recommendations on how the instructions could be clearer, we'd be delighted to hear them and possibly include them in the next revision of the instruction manual. I can see you've already received the bluetooth speaker - feel free to drop us an email at info@thesciencehut.com if you need any questions answered for that build - good luck with it!

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Lucasz Graham
Good project

Assembled in around 2 hours, works great. The clear case is fairly solid, and the LED display is responsive, being brighter in daylight than it is in the dark. Would like if it had a battery compartment in addition to the USB charging port. Might take one out of some broken remote or something and attach it up myself :)

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Carolina Toy
Looks good

Survived the post. I'm going to try it soon. Comes with instructions and assembly scheme. On the PCB itself also indicates where the components go. If everything goes well, I will put the result soon. Thank you!

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