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

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

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

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

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

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

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..

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.



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    49 Discussions


    Reply 6 years ago on Step 4

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


    6 years ago on Step 4

    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 ?


    1 reply

    Reply 6 years ago on Step 4

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


    Reply 6 years ago on Introduction

    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.


    6 years ago on Step 6

    pls share the pdf on mahesh.gan.143@gmail.com


    7 years ago on Step 4

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

    9 replies

    Reply 7 years ago on Step 4

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


    Reply 7 years ago on Introduction

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


    Reply 7 years ago on Step 4

    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.


    Reply 7 years ago on Step 4

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


    Reply 7 years ago on Step 4

    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.


    Reply 7 years ago on Step 4

    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?


    Reply 7 years ago on Step 4

    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.