This project cost me at this time $49.95 Australian for the strip of 30 LEDs.
I already had the desk lamp. If i had to buy it it would have cost me ~ $40 Australian. As the LED strip is geared for 12V I used a power pack / wall wart I had spare. If I had to buy a wall wart I guess it would have cost me anoth ~ $20 Australian.
So I guess you could argue that this project really cost ~ $110 Australian which is roughly $75 US.
Check out the individual steps to see what I have done to end up with a quite passable LED desklamp.
Step 1: All the Bits
- Ikea desk lamp (worth about $40 Australian)
- Old wall wart providing up to 1.4A at 12V (less amps will probably still work ok)
- Double sided mounting tape.
- Strip of 30 SMD LEDs
Step 2: Disassembling the Desk Lamp
How the lamp head looks before the surgery.
Remove the two screws and the wing nut. This will allow you to remove the bottom cover.
The bottom cover is off and the switch and base for the fluoro tube can be clearly seen.
As you can see, the switch has not got any srew terminals for the electrical connections. The terminals are of the type where the cable is pushed in and is locked in place automatically.
To release the cables I had to carefully push in with a small screw driver to release the cable lock.
View of the switch and a short piece of cable I reused due to the new cable not being fat enough to lock in the switch terminals.
Step 3: Preparring the LED Bits.
Step 4: Threading the New Power Cable Through the Arms
Once the old power cable has been removed and the string is in place, sticky tape the new power cable to the string and gently pull the new cable trough the arms.
Step 5: Connecting and Mounting the LED Strips
The positive lead from the wall wart and the LED strips I connected to the two terminals on the light switch.
Where ever I soldered two cables together I used some shrink tubing to provide insulation.
Lastly I wound the surplus cable neatly around the two posts provided to make for a tidier look.
Step 6: Test Drive
Step 7: Final Assembly and Final Test Drive
I have found during many of my projects that you can not have to many test drives. Some projects have worked through all the test drives but failed after the final assembly.
Step 8: Old New Desk Lamp Back on My Desk
The good thing though with the LED set-up is that I made it work... :-)
erm .... and it also uses less power. 2.4W as opposed to 9W.