Introduction: Homebrewed Shaped LED / Heart LED
Finalist in the
LEDs comes in many designs and shapes. But you can also create your own. Here we show an example, a heart-shaped LED.
Of course you can also build individual letters or anything you like. We are pleased to hear of your ideas :-)
the Lichtbändiger from Germany
Step 1: Design
First make a design of the LED should look.
Therefor we create a design with Coreldraw.
Step 2: Heart Building
We cut out plywood hearts in various sizes with an cnc Laser.
Then we glue them together.
That is the shape of the LED.
Step 3: Wax
Now we dip the heart in wax for rounding the edges, and to get it better out of the silicon mould.
Step 4: Embed Form
For a filler in the silicon mold we glue a small sheet of wax on the bottom. On this you can place the heart while the wax is still soft.
Step 5: Silicone Fill
Now simply fill in one of the duplicating silicone. We use a harder two-component silicone, so that the silicone in shaping not tear so quickly.
Then it is for 15 minutes in a pressure pot. It also works without. But then you maybe have small blisters in the mold.
Step 6: Mold
When the silicone has cured, takes carefully the heart out of the silicone.
Then rinse with hot water and dry well. Then all the wax residue from the mold.
Now the mold for the LEDs is ready.
Step 7: Acrylic Fill
We have used a photo acrylic resin material. Is a little more expensive but faster and less complicated.
When filling make sure that the filling hole is not sealed, otherwise the air can not escape from the mold. Air bubbles in the LED do not look so beautiful.
Step 8: LED Prepare
The LED should be centered in the heart, so we put them through a piece of paper.
Then it is dipped into the liquid acrylic.
Step 9: Acrylic Cure
Now comes the acrylic to cure under a UV lamp.
After two minutes the acrylic is pretty tough. Only not under the paper. For this, take off the paper and harden it out for another two minutes.
Step 10: LED Shape and Remove Burrs
Now the heart-LED comes out of the mold. Usually you have some burrs. This is milled of and you can ground the surface.
Step 11: Surface Paint
We have painted the surface with an photo acrylic lacquer, hardened under an UV lamp.
But you can also polish the heart-LED, but it takes longer and is much more work.
Step 12: Checking
Now our heart-LED is ready.
Still connected to an battery and admire the result. It's waiting to be fitted in somewhere :-)
Have fun to recreate it
The Lichtbändiger from Germany
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