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From an Academic paper for a reputable Journal, what the hell are "jillions"? 🤣

I accidentally grew two large KDP crystals overnight! I was preparing a supersaturated solution for growing.(The other was larger but malformed since it grew against the side of the beaker). These have a few defects, and aren't quite clear, but still, a nice surprise!

The other Goliath KDP crystal. Again, accidental as part of a larger experiment, but learning is happening!

An SMPS repair. This is from a Laser and it water damaged, two open resistors, a blown MOSFET and a blown SCR (for which there does not appear to be a datasheet!)

The most horrifying piece of equipment I have ever torn down, a tattoo removal Laser, that seems to be built with the added feature that it can also remove the operator. Permanently. m.youtube.com/watch?v=8khFci…

An interesting piece of vintage tech showed up today, complete with vintage Laser goodness!

Laser Particle Counter Tear-Down. Vintage Helium-Neon Laser goodness! m.youtube.com/watch?v=oUM1OD…

Ever wondered what happens if you reflect a Laser beam back in on itself? A manufacturer in the min 1980's built a piece of equipment that does just that! youtu.be/ad4hxXz4bwA

A smartphone photo of the Sunspot, through a home made Solar Telescope I built aeons ago! I think I should crack out the webcam and see if I get a better shot!

It's the international day of light! lightday.org #lightday

Well since it is the international day of light, I have a new toy. A very short, brewster windowed HeNe tube. Melles-Griot 05-LHB-564. Some fun stuff lined up for this one for sure!

An open Cavity Helium Neon Laser just doing its thing...

Open Cavity He-Ne Laser the Motion Picture :-D youtu.be/PLr8smynpdw #photonics #laser

Want nanosecond moderately high peak power Laser pulses? An Avalanche Laser Diode Pulser! youtu.be/3-htF8Jrixo

Want to grow large crystals of Potassium DiHydrogen Phosphate for nonlinear optics and pockels cells in a week? This video is for you! youtu.be/uSSoSIcXWa0 Crystalverse John Dudley

Asking ChatGPT about UK law and out of frustration asked if it was legal to summon Cthulhu. Best answer ever! Made my day!

Here is a hint for my latest project, taken with a mobile phone camera no less. If you know, you know! John Dudley BreakingTaps

youtube.com/shorts/MZdHofo… #shorts​ Poppy Wilkinson is taking part in a Race for Life Pretty Muddy on the 12th July 2025 to raise money for Cancer research UK. To cheer Poppy on, and give money to Cancer Research please donate below: fundraise.cancerresearchuk.org/page/poppys-ra… Thank You!