Introduction: LED CLOCK Cum NIGHT LAMP


When I wake up in the middle of the night and want to know the time, I have to turn on my mobile to see the time. Now with this LED Clock cum Night Lamp I can just read the time off the wall. This clock is a piece of Art in LED designing, and it puts an Artistic touch to my bedroom. It is very simple to make and is cheap, but looks very expensive, like a piece of a big CUT DIAMOND. Watching it live is mind blowing.

People say necessity is the mother of Invention, so this idea came out of necessity.

I never thought placing LED along a flat surface could create such beautiful designs, and as the LED’s are not facing towards you but is laying on the surface, you do not get the light in your eyes. Experimenting with color LED you can create real work of Art.

Step 1: Items You Will Need

Picture of Items You Will Need

Items you will need for this project.

1.                  Hardboard 12”x12” one piece.

2.                  Wooden batten 12”x ½”x ½”. 4 pieces.

3.                  Some small Nails.

4.                  PVC stickers white 12”x12” One piece.

5.                  12 white LED’s 5mm.

6.                  Capacitor .22uf / 400 volts. One piece.

7.                  Resistor 1K/ ½ watt. One piece.

8.                  Diodes IN 4007 Two pieces.

9.                  Quarts Clock mechanism. One piece.

10.               Wires, solder, nails, etc.

Step 2: Make a Squire Frame

Picture of Make a Squire Frame

In this step you make a squire frame with the wooden batten and fix the hardboard on to it with nails.

Then draw the figure of the Clock on it.

PIERCE the places for the LED’s legs with a thin needle.

The needle holes marks the right place for the LED’s.

Drill a center hole for the clock mechanism.

Cover the Hardboard with the PVC Sticker evenly.

Decorate the FACE of the clock with other colored PVC tape.

Step 3: Make the Clock Face

Picture of Make the Clock Face

In this step fix the LED’s to the Clock Face taking care to bend the legs of the LED’s near the neck at an angle of 90 degree so that it should lie parallel to the hardboard.

Also see that all the POSITIVE legs of the LED’s should be facing to one side.

The LED’s should lie flat on the hard board, making the light travel along the hardboard.

The design of light is created, when the LED’s are parallel to the hardboard.

Now the LED’s are fixed, so start to wire the circuit.

Step 4: The Cicuit

Picture of The Cicuit

This LED CLOCK cum LIGHT LAMP runs on 220 volt AC.

If you want the circuit to run on 110 volts AC, then only change the CAPACITOR to 0.47uf / 250 volts.

Look at the CIRCUIT diagram carefully and always maintain POLARITY.

2 Set of 6 LED’s are connected in series.

2 Diodes are used to control the back voltage if any for safe operation.

After you have connected all the LED’s, Capacitor, Resister and Diodes etc; your circuit is ready.

Step 5: Electronic Circuit Is Complete

Picture of Electronic Circuit Is Complete

Now when the assembly of the electronic circuit is complete it is time to fix the Clock Mechanism.

The Clock Mechanisms are available in the market at a very cheap price with warrantee.

Push the center pipe of the clock mechanism through the hardboard and screw in the lock ring. Align the Clock Mechanisms at 90 degree to the hardboard base.

Fix the pointers Big and Small and the second arm to the Clock Mechanisms.

Put the 1.5volt battery for the clock mechanism in place, and adjust the time.

Your LED CLOCK cum LIGHT LAMP is ready to be plugged in, to be used as a Night Lamp.


You need not plug it in during the day but plug in only at night.



Step 6: Options..

Picture of Options..

Here I have shown how I have manipulated a company made wall clock, took it apart and fixed LED's to suit my requirement.
You can do it with a wall clock having a small gap between the face of the clock and the glass.


nicholasm (author)2012-11-14

if AC is 240v what can i do ?

Dipankar (author)nicholasm2012-11-14

Connect it to 240 volts and see what happens, otherwise change the capacitor to .18uf

andro richard (author)2012-10-24

very nice handmade crafts

9979556777 (author)2012-09-21

wow it's nice watch

elmagnifico (author)2012-09-20

Great idea and nicely done, but I have few things to be sure of, are these two parallel sets of 6 series wired LED's or the opposite (LED's connected in parallel and sets connected in series).
Also the resistor shouldn't it be connected in parallel with the capacitor ?


Dipankar (author)elmagnifico2012-09-20

6 LED + and 6 LED -
As these LED work on AC that is why they are connected opposite to one another.

btmnet (author)2011-09-28

Hi, Can i mix with white and red leds?

Dipankar (author)btmnet2011-09-28

YES you can mix white LED's with any color.

LaserDave (author)Dipankar2012-07-08

Actually, that isn't correct. These series balanced circuits depend on each LED in each "string" to have a similar voltage rating. Since the newer blue/white/purple(some) require 3.2v-3.4v, when they are used with red (1.6v-2.4v) it will off-balance the circuit and blow the reds. Since LEDs will often blow "closed" or "shorted", that will cause a cascade fail and wipe out the others in the string with a quickness.

If you must use colours that are from the earlier technology (red, some yellow, some green) then it would be best to put those colours on one leg of the circuit, and the other colours on the other leg. Always check the voltage requirements from the manufacturer's spec sheet to be sure.

I design and build electronic circuits of every type for a living, and I have used this particular circuit dozens of times in all sorts of different configurations - so I'm telling you this out of personal experience.

One thing to keep in mind is the flicker rate - some people don't notice it and some are driven insane by it (like me). In Canada and US, the line frequency is 60Hz which is bad enough, but in many locations in Europe it is 50Hz which is much more obvious. Basically, you have the two strings of LEDs that are alternating (flashing) back and forth. If this is problematic, use a typical 12v wall adapter and dropping resistors so you can use any colours you want in as many combinations as you want.

mahesh_84 (author)2012-06-01

pls share the pdf on

apervakov (author)2011-12-08

On 120ac the resistor is smoking, I put 1w resistor - the same picture. Why?

Dipankar (author)apervakov2011-12-09

What is the value of the Capacitor you have put on 120VAC?

apervakov (author)Dipankar2011-12-09

4.7uF 250v. Also do you have any idea how to stick a photo resistor in this diagram without losing brightness on LEDs.

Dipankar (author)apervakov2011-12-10

The Capacitor should be .47uf and NOT 4.7

for 120volts AC the Capacitor should be
0.00047uf or
0.47nf or
all 250 volts.

apervakov (author)Dipankar2011-12-10

What formula did you use to find out the data? Also what about the photo resistor?

Dipankar (author)apervakov2011-12-10

I am not an electronics engineer, I use data given to me by an expert who is well qualified.

For 220VAC use .22uf / 400volt with 1k 1watt resistors.
For 110VAC use .33uf to .47uf / 250Volt with 1k 1watt resistors.

as for photo resistor I have never used them, can't help in this regard.

apervakov (author)Dipankar2011-12-10

I just thought that might be very cool to have the wall clock dim at the sunrise and light up on sunset, to add some automation to it. What do you think, can you ask your expert?

Dipankar (author)apervakov2011-12-11

My advice is don't go into complication, just switch ON and switch OFF WHEN REQUIRED.
My expert is qs he is a Pro member, ask him.

apervakov (author)Dipankar2011-12-11

Do you have a link to the page where I can ask him? Thank you.

Dipankar (author)apervakov2011-12-11

Here it is.........
Web Site

apervakov (author)Dipankar2011-12-12

That is great. Thank you.

alan92 (author)2011-06-21

hey those black lines in the gap between the two led's should be connected to the negative terminal........or just interconnection........................and also the black line that is connected in the positive terminal of the battery.......................

badcoconut (author)alan922011-06-26

Alan92 I'm confused at what you're pointing out? Black line to Battery?? I thought this was an AC circuit?

Dipankar (author)badcoconut2011-07-25

There are NO Batteries in this Circuit.
Only Capacitor, Resistance and Diode.

rahulvfx (author)2011-07-24

did anyone tried this ... First of all those black line is confusing.. and what is negative and positive? I guess this was a AC circuit.. Anyways I tried this circuit skipping the black line, but the circuit blown my total house power supply.. Thankfully only the MCB got shut...

Dipankar (author)rahulvfx2011-07-25

Even AC has a Phase and Neutral. The Phase is shown as RED and the Neutral has been shown as BLACK.
Likewise in a LED the long leg is Positive and the short leg is Negative.
Ignore the colored lines but maintain POLARITY, which is important.

tobyscool (author)2011-03-22

I want to make one but i still have exams :(
need to study

Dipankar (author)tobyscool2011-03-22

Finish your Exams first then make this ..... OK

tobyscool (author)Dipankar2011-03-23

done with exams last day today :D

mweston (author)2010-09-04

*sigh* Somebody doesn't know their Latin...

Sin Kelevra (author)mweston2010-10-26

"Cum", is used to indicate that something has two functions, uses, or has been changed into another object.
It is from the word in Latin meaning "with", but it's one of the words English borrowed and uses. Not trying to make you seem wrong, just pointing it out.

Dipankar (author)Sin Kelevra2010-10-27

Thank you.
Here I meant two functions.

jir3h (author)2010-09-06

is this safe when you plug into a 220 volts??just asking coz' i want to make one of these..^_^

Dipankar (author)jir3h2010-09-07

YES jie3h,
It is safe provided you don't touch it while it is plugged in.
The Capacitor brings down the voltage otherwise the LED's will burn off.

your_dragon113 (author)Dipankar2010-10-17

How would the values of the resister, cap and diodes change if I was to do this in Canada using 110v?

Dipankar (author)your_dragon1132010-10-18

For 110 volts........
Use Capacitor 0.47uf 250 or 300 volts AND
Resistor 1k / 1 watt or 1/2 watt.

beehard44 (author)Dipankar2010-10-25

o yuh, add a fuse if you don't want to burn down your house

Dipankar (author)beehard442010-10-26

But you can if it gives you peace of mind.

Banerjee (author)2010-10-07

Very good Dipankar, It's a nice project. I must do it my bed room. Congrats for getting VOTES.

dawoj (author)2010-09-29

Good job Dip

auramale32ml (author)2010-09-27

nice work sir.

DrakerDG (author)2010-09-06

Good design. Congratulations! I have wanted to make one.

pandyaketan (author)2010-09-04

2 independent power sources - 1.5v cell for the clock & 230 V AC for the LED Lamp. Another ace from the ace ! ;-D Congrats sirji !

Wesley666 (author)2010-09-03

HAHA! I love it when people screw and don't realize it!

zascecs (author)Wesley6662010-09-03

whoah! that's real weird...

 I think you missed out on the "up" in your sentence. o_O 

Apperently, you're also part of that group of people...

Wesley666 (author)zascecs2010-09-03

Who is to say I didn't do that on purpose! Wink Wink, Knudge Knudge! LoL! ;P

zascecs (author)Wesley6662010-09-03

well then that would be extremely random... lol

ray_Bond (author)2010-09-03

Nice one bro :)

trike road poet (author)2010-09-03

Nice one, Dipankar, this is one project that can be modified so many ways for that personal touch. I will be building one of these, and use a CD as a background to get some extra reflections off the CD surface as well. A fun project, thanks for posting it.

rimar2000 (author)2010-09-03

Very nice design, Dipankar. And besides, XXX!

About This Instructable




Bio: Now I am a retired person, who enjoys life and making small things to pass the time keep myself busy.
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