A long time ago i saw in Hack a day a light for macro in a camera and I thought it can be a good idea to use a led ring with the dremel to light up the working area under it.
Step 1: Materials
-Nine smd LEDs
-An old mobile charger (4.5-5.5v)
-One 15ohm resistor
- Male and female plug (optional, you can connect the charger dirctly in the PCB)
-The PCB, you can download the PCB stencil.
Step 2: The PCB
Then, cut the corners and file the outside edge.
Drill the center hole and make it bigger until tha dremel fits prfectly in it.
Then drill the holes for the female connector and the resistor and you have finished the PCB.
Step 3: Soldering the LEDs
Then Place carefully the LEDs un the same direction, because they're in parallel. (I've placed them with the anode conected to the outer ring)
Heat up the leads and the tinned areas (or the soldering paste) to solderthe LEDs in their places.
Step 4: The Connector Plug and the Resistor
Then connect the plug with the mobile charger and isolate them with heat shrink tube or insulating tape.
Step 5: Test Time!
Put the ring in the drill, tighten the nut and plug the charger.
If it doesn't work, turn the plug maybe you didn't connect it correctly.
If it still not working, check the LEDs conection, you could shor-circuit one of them.
As you can see in the photos, it lights up the working area very well, now, drilling tiny holes is not going to be a problem anymore!
Thank for reading and please, vote this instructable for the Lamps & Lighting Contest and the Up! contest.