An adjustable full colour moodlamp with a cast concrete base. The organic form of the lamp is made by putting a large lycra sock over 2 aluminium rods that are bent over and held by embedded tubes in the base.

The bulk of this instructable is about creating the concrete base. There isn't much on the electronics - as there is so much already out there about using micros and LEDs.

Step 1: Making the Mould

I wanted the base to

  • be heavy,
  • have adjustable feet,
  • have recessed panels for the controls and power,
  • have integrated tubes that will accept the aluminium loops for the fabric form.

The mould was made from melamin coated mdf. The central inserts that will need to be removed after casting were pine, covered in modelling foam and then layers of packing tape. This allows a bit of wiggle for removing the inserts.

Tubes for the aluminium supports were held in place with short lengths of the aluminium rod (also keeps the concrete out). Nuts for the front panels and LED plate were also cast into the concrete.
Great project and nice work (esp. on the base - that was worth the work it took - looks fantastic!)<br><br>One thing. You said: &quot;I didn't use gravel, just sand and concrete&quot;. What I'm think you meant to say was &quot;I didn't use gravel, just sand and cement&quot;. An engineer should know better! :-D<br><br>And yes, I know I'm nit-picking! Its what I do... ;-)<br><br>To clarify these frequently misused terms we're all guilty of mixing-up (pardon the pun) for everyone: 'concrete' is the end product produced by mixing 'cement' (http://en.wikipedia.org/wiki/Portland_cement) with aggregate (generally a mix of sand and gravel or variations thereon - though other materials can be used, for example, papercrete is made with pulped fiber - http://en.wikipedia.org/wiki/Papercrete).<br><br>Again, very nice project Matthew!
thanks for the correction!
Looks great! I would love to see the code for this if possible...I have already built an LED column using several pieces of flexible RGB LED strip...I'm just having a hard time writing different &quot;programs&quot; to choose...different fade types etc. Thanks!
What type of power transistors did you use?
hi, sorry for late reply!<br><br>I can't quite remember what I used. If I was doing it now I'd use mosfets because they won't waste power (very low on resistance).<br><br>A lot of integrated RGB LEDs have a common anode or cathode (so only 4 pins). This means you need either an N (common anode) or P ( common cathode) channel mosfet.<br><br>If you're driving 3 separate LEDs then it doesn't matter, just get the LED and mosfet in the right configuration.<br><br>Here's a link to a circuit that is for common anode using N channel mosefets.<br><br>http://tobiscorner.floery.net/projects/avr/tinyrgb/powerrgb/70
Thanks so much, but can I still do a smooth &quot;mood-lamp&quot; type transition between each colour while still using powertransistors? Or will it have to be solid colour changes (I.e blue, light blue, light green, green, pink, red, repeat)?
Very nice. I wish I knew somehing about electronics.
what kind of stuff do you want to know? There is a lot of great info on the web to get started...
This is true :) Over the summer I plan on educating myself on this stuff. I could possibly start on my quest for knowledge during the school year if classes arent as demanding as they look.
A good place to start is to learn about Ohm's law. Then learn about series resistor circuits, parallel resistor circuits, and then series-parallel circuits.
it looks like polishop's living colors... wonderfull. i'll try some day for sure!!!
Awesome, very nice gonna try some day.
Good instructable, and the final produce looks pretty cool too, great work!
Very nice!

About This Instructable




Bio: I'm an artist/engineer excited about making cool stuff!
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