Make Your Own LED Ring for Dremel




Introduction: Make Your Own LED Ring for Dremel

About: I love electronics and all about DIY.

Sometimes, when i'm drilling a PCB with my dremel, it shadows all the area below, making my  job too difficult.
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

For making a led ring you will need:
-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

First of all, you have to print the PCB, (make sure it is the correct size for your LEDs and the dremel screw).
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

Now, you have to stain the places where the LEDs are going to be, (make sure that the inner and the outer copper rings are not in contact). If you have soldering paste, use it.

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

First of all, insert the socket and the resistor in series with the LEDs and solder them.

Then connect the plug with the mobile charger and isolate them with heat shrink tube or insulating tape.

Step 5: Test Time!

Now you've finished the ring, is time to test it.
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.

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36 Discussions

Awesome! Just like the one I built for my ShapeOko spindle a while ago.

I'd like to combine this design with it's full ring of lights with the magnetic induction power source of Dremel's own light attachment.

best effin thing ever !!! thank you.

I like your idea so much I searched Amazon for "Dremel Light". They have one that is very similar but with only 2 bulbs and it costs $55 dollars! I think I'm going to make your version. Outstanding work!

Hi, nice work yet simple but how about power rating of the 15 ohm resistor ( from the image I say it`s a 1W resistor and NOT a common 1/4W ).
What is the voltage and current of the smd led you used?

If someone want to use STANDARD WHITE led should put a 45 ohm (or standard 43 ohm) 1/4W resistor for 4.5V or 95 ohm ( or standard 91 ohm)for 5.5V power supply.

Resistor value is :
R=(Vs-Vf) / If where Vs=SOURCE voltage, Vf=LED voltage, If=LED current (for WhiteLED If= 0.020A=20mA and Vf=3.6V);

"Wattage" P=I*I*R (for WhiteLED @4.5V is 18mW=0.018W and 1/4W resistor is more than enough). Hope this will help you somehow.

1 reply

I used the 1w resistor because it was the only under 400ohm i had on hand.
And because i saw the LEDs were bright enough with it i didn't get a new 1/4w resistor because in my city shop they're about 0,60$ each one, so i try to use what i get from trash.
It was also because i didn't know how to calcule resistor for LEDs.

Really cool. I want one. Does it limit your dexterity, range of motion, or how you hold the Dremel in any way?

1 reply

Now you should make an inductive version like the one that came with my Dremel.


Could you please expand a bit about how you made the PCB?

Thanks and you did a very nice job!

1 reply

There are a few simple steps in this method :

1.Print out your design on a LASER Printer, An inkjet will not work, Glossy paper is the best to use (or use a page out of a magazine)

2. Place your Board design on your copper clad board & iron it on the hottest temperature for about five minutes, just to be sure all the toner has been transferred.

3. Place your board in cool water for a few minutes, Then rub the paper off. You should be left with the design on the copper clad board.

4. Etch the board. I use one part of hydrochloric acid diluted in five of hydrogen peroxide. it takes about 5 minutes to etch.

5. Once your board is etched, remove the left over toner. There are a few methods to do this. I use a mixture of steel wool (To get the toner off to a rough standard) then clean the board up with acetone to ensure there are no bits of toner on the board.

NICE! I'll try something similar but I have two questions:
1- why not to use traditional pin in hole led with a general purpose PCB? It should be easier then to use the SMD leds (and maybe cheap)
2- do you think is possible, stantring from a copper board to create the circuitry mechanically directly with the Dremel instead of doing the etching process?

1 reply

I have never used a general purpose PCB, but i think it'll be OK. About creating the circuitry mechanically directly with the Dremel i think i'ts much more difficult, etching the PCB is the perfect solution.

nice and easy project of an afternoon for lighting your jobs with!!!

Nice! Just got my Dremel today, Will build one for sure. I think I will take traditional LEDs which are not surface-mount, so you won't really need a PCB.

You could also connect them in series rather than parallel, requiring a power supply with a higher voltage (but lower amp rating). I think 12V are easier to find (read: recycle).