Spell Out the Time with Frickin’ Laser Beams

Clocks are a never-ending source of fascination to hackers. We get all kinds around here, from Steampunk Nixie clocks to retro cool flip clocks to clocks that don’t even look like clocks. But this is something new — a glow-in-the-dark laser tracing clock.

What [tuckershannon]’s clock lacks in practicality it makes up for in the gee-whiz department. The idea is simple: trace the characters out on a phosphorescent screen using a laser. To accomplish this, [tuckershannon] adapted the design of this whiteboard marker robot clock, replacing the drawing surface with glow-in-the-dark stickers. A 405 nm laser diode module is traced over the surface by the two-servo pantograph plotter, charging up the phosphors. He offers no clue as to how long the ghostly image lingers, but from the look of it, we’d bet that it lasts for a good fraction of a minute, especially in a dark room. Then again, you’d want the image totally faded before the next write cycle comes up, to prevent overwriting the previous time.

All in all, it’s a nice design and a clever new clock display modality. And who knows — maybe this whole glowing phosphor display thing could really catch on.

Continue reading “Spell Out the Time with Frickin’ Laser Beams”

Living night light with glowing algae

I may sound like I’m being over enthusiastic in this video. I’m not. Everyone who has seen this thinks it is simply amazing.

My father, an ex navy man, has told me stories of glowing water since I was little.  Being a person who was obsessed with all things that light up, this always stuck with me. I saw a headline one day that someone was making an algae-light. Sadly when I clicked on it, the algae was just there to create oxygen. It was a cool idea, but not what I was hoping for.

That slight disappointment drove me to create a night light using glowing algae. The process could be extremely simple.

1. Buy Algae.

2. set up light for algae (it needs a 12 hour light cycle and putting it in a window sill would kill it due to heat). It needs bulbs labelled 6500k or higher.

3. shake algae at night (it only lights up when agitated, and when it is on its “night” cycle).

I really wanted to add more to this project though, so I decided to put the algae in a klein bottle and build a custom base for it that would allow me to move a BB around inside the bottle using magnets. This would in turn, hopefully, agitate the algae and make it light up.

Continue reading “Living night light with glowing algae”