GlaDOS lamp

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dragonator
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GlaDOS lamp

Postby dragonator » Sat Aug 15, 2015 7:14 pm

Show off the great GlaDOS lamp you made here. Already, kudos, the GlaDOS lamp is one of the biggest and most complicated builds I have ever made. Made it tracking, added the witty remarks about your weight, added neurotoxins (hopefully not)? Share it here.

Simon
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Re: GlaDOS lamp

Postby Simon » Fri Sep 16, 2016 10:07 pm

Hi,

I'm in the process of building one, and am unsure how to fix the LEDs in the hexagonal spaces -- the heatsink would fit into the space, but there is a bit of distance there due to the cables.

Image

Should I just glue them and hope that nothing breaks, or is there a better approach?

Also, I need the drivers for the LEDs nearby. For the base, that's not a problem, I just place them on the inside, they stay in position mostly because of the bus cable, but in the head I'd need a huge cutout for the driver board (42.5x25x5mm), do you think that is possible to do?

Image

Simon

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dragonator
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Re: GlaDOS lamp

Postby dragonator » Sat Sep 17, 2016 9:07 am

Hello Simon,

The leds can't touch the plastic, there is no space, so your observation is right. Simply gluing them in place is good, although you can't use hot glue. Be aware that you also need additional heatsinks on the backs of the leds and good airflow to keep them cool enough, especially if you are using 3W instead of 1W.

Does the driver really need to be that close? 0,5m is not really a long distance for a simple constant current driver. I don't think the driver can fit in the head, there is not much space for simply the led.

Simon
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Re: GlaDOS lamp

Postby Simon » Sat Sep 17, 2016 10:12 am

Hi,

so I definitely need to build an insulating layer -- these LEDs have 8W when all four channels are at 100%, and I've already managed to desolder one of the cables during my burn-in test, so I'll have to grumble at the guy who told me a temperature sensor would be "overengineering". Currently pondering to make custom heatsinks with the CNC mill...

The driver for the eye LED can indeed be placed anywhere, as long as I can route 8 cables between it and the LED without it looking weird, so it can go into the base (the spokes are 4x +5V and 4x GND, 4x PWM for the servos and 4x PWM for the eye LED then).

I still have trouble finding the right servos, I have a HXT500 for the head and a HXT900 for the neck now, which seem to fit for the most part, but the head only has a few degrees of motion this way:

Video of head movement

SImon

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Re: GlaDOS lamp

Postby dragonator » Sat Sep 17, 2016 9:10 pm

I think getting rid of a full 8W is going to be a big challenge. I already had trouble with 3W per led. The 40mm fans were quite noisy and 24W of LED light is quite much for most rooms. At 8W per led you will need proper airflow (active, not passive) and some good fans.

Luckily for the wiring, glados is supposed to have wires going from the base to the body.

The head seems to be mounted the wrong way around (hard to see) and the motor linkage is not mounted on the right place. There is a blind hole on the inside where the linkage is supposed to go. With that, you should have more movement in the head.


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