Bubblegram / Laser Crystal LED Stand

When I visited the European Space Center earlier this year I picked this cool bubblegram of the planets in our solar system. I decided to make a base for it so I could light it up with some LED’s.

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I decided to get with RGB LED’s so that I could have the colour change over time. Making a circuit for one of these was easy enough. I used 3 x 220 ohm resistors for each of the three anodes on each LED.

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I soldered the resistors to the LED and added cables for the anodes and cathode.

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An Uno board was used to test the LED. pins 9-11 (PWM pins) were used to control the colours and brightness. By altering the PWM width for each colour the brightness of each colour and thus colour mixing can be controlled.

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Next I set about designing the 3D model of my stand. I created a block the size of the bubblegrams I have and added a rim round the outside to hold it in place. I hollowed out the middle to make room for the electronics and cut a hold in the side for the power plug.

The stand is available on Thingiverse https://www.thingiverse.com/thing:3633780

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There is no way an Uno board would fit in the stand so I picked up a Nano to use instead.

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Before squeezing the electronics into the case I decided to wrap the RGB boards I had made in shrink wrap to prevent them shorting out if press against the other boards. A hole was cut for the LED to poke through.

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The electronics were crammed into the stand. They literally just fit!

The LEDS were programmed to cycle through different colours in a loop.

The scripts I have written to do this to are available on my GitHub page. https://github.com/shane-powell/led-lighting

 

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