This AC LED Night Lamp is dedicated to my friend and adviser *qs*. Without his help I could not have done it.
This Night Lamp runs on AC and is also a Emergency Light when run on the UPS of your PC. during power cuts.
Step 1: STEP-1
First of all we will fix the LED's to the Perforated Hard Board.
Fix a row of 5 Blue LED's each on both sides of the Perf Board.
Then fix 6 rows of 5 White LED's in between the rows of Blue LED's
That is in total 10 Blue LED's and 30 White LED's = 40 LED's.
After fixing the LED's to the Perf Board we will wire the Circuit.
Please see the next Photograph for guidance.
Step 2: STEP-2
WIRING THE CIRCUIT.
Follow the Circuit as per the Diagram, The Circuit diagram is very easy to follow as it shows all the polarity of the LED's clearly.
The step down Transformer is a 220 volts to 12 volts. AC.
Blue and White LED's working voltage is 3.3 volts.
Therefore 12v X 1.4 = 16.8 divided by 3.3 = 5.090 so I have taken 5 LED's per row.
This is as per the calculation of my friend **qs** in his Instructable AC with LED's.
A change over SPDT switch is connected for Night lamp (Blue) and Emergency Light (White)
Care should be taken to keep the POLARITY of the LED's as per the circuit diagram.
Step 3: STEP-3
See the photograph and solder the LED's as per the circuit diagram mentioned in STEP-2.
Step 4: STEP-4
Fix the Stepdown Transformer in a Metal Box.
Fix a Wooden batten to the Cover of the metal Box with a up & down JOINT.
Fix the LED Light Assembly to the JOINT with screws.
Connect the output wires to the light assembly.
Fix a 2Pin male plug to the input wire of the Transformer.
Please see Photograph for guidance.
THE NIGHT LAMP PLUS EMERGENCY LIGHT IS READY FOR USE.
Step 5: STEP-5
Here I have made another AC light using 10 mm Milky White LED's. (see photo)
A Stepdown AC transformer of 220 volts to 18 volts is used.
18v x 1.4 = 25.2 divided by 3.3 = 7.636 so I have used 6 LED's because of 10mm size LED's.
I have used 6 LED's in series and 4 rows of LED's in parallel.
The same Circuit is used but without a changeover switch.
This light unit is very bright and can be used as TV viewing Light and Emergency light.
Cost of the light unit comes to 2US $ in India.
SEE MY ANOTHER INSTRUCTABLE "STADIUM LIGHT"