Laser Activated Shutter

[@mikesmith1290]

You can tell he knows his shit. That Casio Databank is a dead giveaway!

[@sandragranados5534]

Absolutely perfect 👌🏻

[@martinm.8769]

great videos and explanation.. only the music is extremly disturbing...

[@FreqsandVibes]

You think you can do a basic Electronics 101 video please you explain things so well.

[@Richie_]

You can get just under 1V when shining an led torch at a 5mm green LED.