Yes. The first time I had seen this was last year or the year be for.
I don’t know if I have the time of for it yet.
Tumblers for polishing brass shells also.
This is an upgrade to my small trick. I was playing glow in the dark/neon projects. I used chap flashlights and soldered UV leds in it. I jumped from 9 led flashlight to 27 led flashlight.
I have known this for a while. I don’t remember when I first came across it. Diodes in ics.
So I finally took the plunge and ordered Dave Jones EEVblog 555 t shirt. lol
I still continue to learn and study 555 ic.
I got my hands on an older prolite. I opened it up to see how it works. It uses ulb2003. I now know why. I first seen uln2003 as a 5V stepper motor driver.
Do you still have lego?