This instructable shows you how to make a desk lamp out of scrounged scanner parts and a few extras from Home Depot.
I have set up a small solar array, controller and a storage battery. I wanted to make some low power lighting that I can use in my office that would not consume a lot of power.
I had a bunch of scanner parts lying around and decided to put them to good use.
Step 1: Get Your Parts
Scrounge a scanner head and pick up the following parts from Home Depot:
1. Scanner Head
2. 6' Lamp cord and switch - $3.99
3. Low voltage lighting base - 2 for $5.95
4. PVC 1" adapter threaded on one end, slip to fit on the other - $.87
5. 12" x 1" diameter PVC threaded pipe, (nipple) - $1.12
1 1/4" hole saw
hot glue gun
solder iron & solder
Remove the lens and camera electronics and save for your next project.
Keep the displayed power circuit in place on the scanner head.
Step 2: Trim the Low Voltage Base
Take your knife and trim the extruded ridges from the base plate.
Rotate the base and trim all the ridges.
Step 3: Remove Upper Section From Base Plate
Take your hack saw and remove the displayed section from the base plate.
The 1" PVC adapter will not fit unless you remove this section.
Step 4: Attach PVC Adapter
Press the 1" PVC adapter (slip to fit side) onto the trimmed base plate.
Step 5: Attach and Trim PVC Pipe
Screw the PVC pipe into the threaded adapter and use your hack saw to trim the pipe:
I trimmed my pipe to 12" from the base plate. You can adjust yours to fit your needs.
Lower for brighter focused light, Higher for wider disfused light.
Step 6: Remove Reflector Side of Scanner Head
You will have to play this one by ear. I am sure that each scanner head is slightly different.
Remove the screws and carefully remove the base plate.
Be careful not to damage the light tubing when you remove the cover.
Notice the light tube reflectors that run along the slot for the light tube.
Step 7: Length Measurment
Measure the mid point on the base plate to properly align the hole you are going to drill.
Step 8: Measure Center Point for Drill Hole
Use the ruler to determine the center point on the base plate for both length and width so you mounting hole will be aligned properly.
Step 9: Drill Your Mounting Hole
Center punch the location where your length and width measurements cross and drill your mounting hole.
You will need to drill an 1 1/4" hole in the base plate.
This hole is slightly under sized. You will need to file the hole slightly larger to fit the PVC pipe.
I used an old soldering iron to enlarge the hole.
Step 10: Install the Scanner Head
Insert the PVC pipe into the Scanner Head and hot glue the pipe in place.
After hot gluing, turn the lamp right side up and make sure that the scanner head is aligned.
It takes a minute for the hot glue to cool enough to become solid. This will give you plenty of time to align the scanner head.
Step 11: Trim the Power Circuit Wires
We need to trim away the electrical connector in order to solder the lamp cord with the switch to the power supply leads.
Step 12: Solder the Lamp Cord
Double twist the power leads on to the lamp cord and solder the leads.
Be sure that you run some heat shrink tubing onto the leads before you connect the leads.
After soldering slide the heat shrink tubing on to the bare sections of wire and heat with the soldering iron to secure the connections.
Step 13: Finish Up
In my application I will add some wire connectors and attach the light to my storage battery.
You may want to attach the lamp cord to an AC to DC adapter.
Notice the voltage and current readings on my power supply.
The lamp is running off of 12 volts and consuming 370ma of current.
The lamp could be just a bit brighter, for my taste, but it is enough light to read by.
I am thinking of adding a second light tube and power supply from another scanner head that I have.