Picture of LED Resin Cube V2
Use clear resin to make an LED cube.

As the title indicates, this is my second version of making a LED resin cube.   The original version worked well, however there were so many good ideas posted on how to improve it that I decided to make another, (hopefully improved) version. 

The main issue that I had with the original was how the batteries were charged.  I used a female jack to charge up the batteries.  This took away some of the aesthetic of the finished product and definitely wasn’t the best way to charge the batteries.  The new one has a charging station and the resin cube is totally enclosed.

In the comment section for the original LED cube, Instructable user - Wesley666 suggested using a “wireless recharging system” which works on induction, the same way that some electric toothbrushes work.  I thought this was a great idea and purchased this one which another Instructable user – offtherails2010 suggested.

This version of the resin cube is a little bigger, but the finished product works a treat.

Hope you enjoy.

Here’s a video of it working:

If the above doesn't work try this:

Step 1: Gather the Bits

Picture of Gather the Bits

1. Clear Resin.
I purchased mine from the local hardware store

2. Resin catalyst

3. Mould.  
I used a baking soda container that I found at my local supermarket.  You could use virtually any shape mould you like as long as it's plastic.

4. LED Lights and circuit board – Ebay
The circuit board is from a fiber optic toy which I pulled apart.

5. LED’s (Red, Blue and White) - Ebay Again you could use any colours you want.

6. 4 x AAA re-chargeable batteries. - Ebay

7. Copper wire.  Try a hobby shop.

8. Wireless re-charging coil – purchase here (this one is a 9V charger), or Ebay (this one is a 5V charger)

9. Mercury switch – Ebay

10. Charger.  I used a 7.5v, 1A charger.  - Ebay

11.  LED

12.  Resister (5K)

13.  Toggle switch


1. Soldering Iron and solder

2. Pliers

3. Wire cutters

4. Measuring cup

5. Multimeter

6. Wet/Dry Sandpaper 120 grit, 600 grit, 1200 grit

7. Brasso

8. Car polisher
ccronkhite1 year ago
can dyes be added to the resin to add color?
lonesoulsurfer (author)  ccronkhite1 year ago
Yep - check this website out for some good idesa
Arrogance1 year ago
Hello there,
Thanks for your instructible.
I am just wondering if the resin if poisonous ?
Any tip handling it when making this?
lonesoulsurfer (author)  Arrogance1 year ago
It can let off some fumes when the catalyst is mixed with the resin so a well ventilated area is a good idea or even a filtered mask. Also it's really sticky stuff so I always make sure that there is something covering my workbench before I start to pore.

Thank you for the reply friend :)
Nice day
wrecks1352 years ago
I saw you first one and this is a nice improvement - great job!
codongolev2 years ago
the photos sort of answer my question, but how much does the resin diffuse the light? I'm planning on making a similar thing as a light fixture for my dorm room, and it has my housing group's letters written in LEDs. I got it wired up, and it looks really cool and works just fine, but it BLINDS you when you look directly into it. I was wondering if the resin will help with that, or if I should buy some parts and make a PWM dimmer.
lonesoulsurfer (author)  codongolev2 years ago
The resin diffuses the LEDs slightly but I don't think enough for what you want. There still really bright if you look directly at them. You could lightly sand the LEDs which would diffuse them or you could sand the resin and make it frosty!
Bobmonkey072 years ago
Maybe a pressure switch for the charger?

Set the cube down and it charges, take it off and it cuts power.
An optical switch (interrupt or proximity) would work, using a simple timer to limit the total charge possible each time to avoid bursting the sealed batteries. No heat dump due to their presence in the resin cast, so overpressure/overcharging could be an issue.
I agree, a simple 555 timer would work best to avoid the heat issue and put it into the docking station, not the cube. Another possible option might be to mount a heat sink to the outside edge of the cube, only half cast into it so that some of the heat could be dissipated from the batteries. I know relatively nothing about casting in resin or other media, but I do know just a little about thermal damages and a good copper or aluminum wire will carry heat away fairly efficiently.
lonesoulsurfer (author)  Bobmonkey072 years ago
That's a really good idea. It would make the charger look a lot more slicker.
momentary switch :D
Marvelous! Me too love resin embbedings and keep trying something like this. The option of using supercapacitors look more interesting for me too. Congratulations. It is a superb creation of yours. Having time please visit my blog www.resinamagica.blogspot.com.
lonesoulsurfer (author)  andre rezende2 years ago
Hi Andre,
Just checked out your blog, very cool. I especially like the little house inside the resin with the windows lit-up with LED's. I was thinking of doing something similar but with Star wars micro machines to create a scene from Tatooine . Just have to figure out how to makes Luke's house!
Great! IO don't know exactelly how but I am following you!
And thanks for the answer!
I used smd 0605 leds. Very tinny. Suitable for that.
rafal28932 years ago
Electronics could mirror cover that looked nicer
nerd74732 years ago
wow epic I haven't done any epoxy projects yet
dozer7892 years ago
That is really cool!! Congrats on being featured!! I voted too!!
lonesoulsurfer (author)  dozer7892 years ago
Cheers - really appreciate it!
No problem!
Michael_oz2 years ago
Your copper wire holder looks better, you could use conductive paint/glue for the connections.
lonesoulsurfer (author)  Michael_oz2 years ago
Agreed. I didn't even realize that conductive glue was about! Just found some on eBay though which i'm going to purchase.

kscmac2 years ago
Try using a super cap instead of batteries! And have a solar cell on the bottom to charge outside. Just an idea!
lonesoulsurfer (author)  kscmac2 years ago
I've been looking into super caps and trying to work out what the best method would be. Good idea though about the solar panels - I had the same one with my first version of the resin cube
friede2 years ago
i build a very similar one but mine has a led driver which can dim the led stepless.
Lovely looking project.
lonesoulsurfer (author)  Dream Dragon2 years ago
Makedo2 years ago
How about using capacitors instead of batteries? that way you don't have to toss it out when the batteries die. even rechargeable ones die sooner or later. with capacitors you can have a lot longer use for it.
lonesoulsurfer (author)  Makedo2 years ago
Agree. I have to do a little more research first on what would be the best option but I definitely want to go down that path on my next build.
Mackramer2 years ago
The music was enough for me to favorite. LED resin cube is pure bonus.
lonesoulsurfer (author)  Mackramer2 years ago
Thanks. There's a cool site called: www.dilandau.eu which has some really great music you can download for free.
if you decide to make it smaller, make some ice cube size :-) for drinks
lonesoulsurfer (author)  thematthatter2 years ago
Yep I was thinking of doing that using some blinking LED's and a capacitor. You could have 2 small pieces of copper just showing through the resin which could be used to charge the capacitor.
They'd look great in a drink.
Zedsquared2 years ago
This project seriously needs some safety features if it's not going to be a fire or explosion hazard IMHO. Anyone building it should consider the consequences of overcharging batteries that can't cool or vent properly with a circuit that's not designed to charge batteries and won't limit its current to less than 600mA. A supercapacitor would be much more likely to be safe as long as it is charged within its rated voltage. Alternatively put a proper battery charging circuit that is matched to the battery chemistry in the cube after the power receiver. A thermal fuse in contact with the batteries and in series with the charging supply is a good idea but if you strip the insulation off the batteries then bear in mind the possibilites for shorting things out with the metal case of the fuse.
Perhaps a timer in the charging station would be a help too... I would never leave the circuit as presented charging unattended.
gcanders2 years ago
Very cool.