Introduction: Minimalistic Led Clock

Picture of Minimalistic Led Clock

In this instructables, I will show you how to make a simple/minimalistic led clock.

The clock shows 3 dots.
One from the seconds (blue), one for the minutes (yellow) and one for the hours (red).

Let's get started!

Step 1: Parts

Picture of Parts

For this clock, you'll need several parts. These are:

Step 2: Schematic

Picture of Schematic

This project has pretty simple wiring.

First you connect both rings after each other.

Then you connect the input of the rings to pin D9 on the arduino.

After that, you can connect the RTC to the arduino on pins A4, A5 and D2.

Step 3: Clock Overlay

Picture of Clock Overlay

I made a pretty basic layout, which fits the led rings.

I printed it on heavy paper, so the leds aren't that bright.

After you printed it, just cut out the circles and its ready to use.

Step 4: Code

Picture of Code

In the code, I used 2 libraries.

The first one is the adafruit Neopixel library

And the second one is the RTClib

To set the time, connect the arduino to the computer and open clock.exe in clock.rar.
It will show all com ports available and ask you which port you want to use. Just type "COM0" where 0 is the number you want. The script should automatically update the time of the RTC using the time off your computer.

Step 5: Resume

Picture of Resume

That's it, now you have a simple led clock.

I hope you liked it and you are able to recreate it yourself.


ravijag (author)2016-11-28

i found the ring arcs here as well. Have not purchased yet as i understand shipping times are long but prices are good per feedback seen.

laaaubravo (author)2016-08-17

Hi, really nice proyect, but I don't really understand the power supply for the clock and the Arduino. Could you explain please? can the arduino be powered by batteries?

Laurens-Wuyts (author)laaaubravo2016-08-17

As power supply for the project I used a usb wall wart.

You can power it from a battery, but I don't think it will run for a long time. Because the leds and the arduino use quite some power.


ndronet (author)2016-07-14

Thanks for posting links on where to get the parts! That really helps.

tomas75a (author)2016-07-11

Cool clock! :)

josh7727 (author)2016-07-11

Great project ,but the power source u. Used and can I used a arduino uno instead

Laurens-Wuyts (author)josh77272016-07-11

Yes, you can use an arduino uno.

As power source I used a 1A USB charger, as there are only 3 led's on at the same time, which brings it to about 3*60mA = 180mA for the led's.

If you want to have all the led's on at the same time, you should have a power supply capable of delivering 5A (84*60mA).


sanjaykray (author)2016-06-16

Great! inspired me to make one.

kcraske (author)2016-06-16

I just love anything to do with time and clocks. Thanks.

Laurens-Wuyts (author)kcraske2016-06-16

I'm glad you liked it.


About This Instructable




Bio: twitter: @Laurens_Wuyts
More by Laurens-Wuyts:How to Use the Beelink SEA I Media PlayerMinimalistic Led ClockControl Raspberry pi GPIO using an app
Add instructable to: