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Vacuum Tube LEDs: First Light!

A test lashup to see how it all works, with an ersatz plate cap atop the IBM 21HB5A Beam Power tube on the far right end:

Vacuum Tube LEDs - test lashup

Vacuum Tube LEDs – test lashup

Those sockets must mount in a chassis, not flop around loose on the cable.

I hacked the code out of the Hard Drive Platter Mood Light; there’s a lot to not like about what’s left and I must rethink the overall structure. The colors now run an order of magnitude faster than the Platter Mood Light, with a 90° phase angle between successive Neopixels.

The mica spacers in the 12AT7 Dual Triode tube (second in the sequence, Noval socket) look cool & crystalline:

Vacuum Tube LEDs - Noval tube - blue phase

Vacuum Tube LEDs – Noval tube – blue phase

When the red phase comes around, it becomes a firebottle:

Vacuum Tube LEDs - Noval tube - red phase

Vacuum Tube LEDs – Noval tube – red phase

With a touch of fire in its hole, the IBM 21HB5A Beam Power tube looks just flat-out gorgeous, despite that translucent blue plate cap:

Vacuum Tube LEDs - IBM 21HB5A Beam Power Tube - violet amber phase

Vacuum Tube LEDs – IBM 21HB5A Beam Power Tube – violet amber phase

Cool green works pretty well:

Vacuum Tube LEDs - IBM 21HB5A Beam Power Tube - green violet phase

Vacuum Tube LEDs – IBM 21HB5A Beam Power Tube – green violet phase

If you wait long enough, it’ll probably turn True IBM Blue.

This worked out even better than I expected!

The Arduino source code as a GitHub gist:

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  1. #1 by madbodger on 2016-02-11 - 10:15

    Pretty! I like that the bases are translucent too, but it would be interesting to see one in black so most of the light is coming from the tube.

    • #2 by Ed on 2016-02-11 - 10:46

      I have both black and natural PETG in the drawer, cued behind the last of the cyan. I’ll start with natural (think “ceramic”) sockets, then drop a brass tube down the hole for directed light …

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