While clearing my store, i found my old desk lamp, non working desk lamp. Despite repairing, i rather convert it to LED which is better brightness and energy efficient too.
Step 1: Disassemble the Lamp
The parts of desk lamp when dismantled.
Step 2: PCB Design and Stickering Techniques
The circuit and LED arrangement are made using PCB software.From the software using P-Cut machine the layout of circuit are made
Step 3: Board Preparation
After submerge the board into the ferric chloride acid, the remaining sticker are removed to reveal the copper trace
Step 4: LED Board Preparation
The board are stick with chrome sticker as reflector and and drilled for LED
Step 5: LED Soldering
The LED used here are piranha type from ebay. just about MYR 0.25 each.
Step 6: LED Board Mounting and Finishing
The completed LED board wire soldered and mounted using copper stand to the plastic body.
Step 7: Power Supply
All components used as power supply for the LED lamp.
Just a simple LM7805 voltage regulator circuit.
after all components soldered and tested, the board and transformer are mounted back into the base.
*transformer used here are salvaged from old radio. Heavy transformer makes the lamp more stable
Step 8: Assembly
All arm and lamp parts are assembled as original condition with proper wire dressing.
Step 9: Circuit Board Set-up
the power supply board and power transformer are screwed and mounted properly with proper arrangement for cover.
Step 10: Testing and Finishing
Excess silver shining sticker removed, and the lamp are tested
Ready to light...