Episode 61 #laser #electronicscreators I bought a Tattoo Laser power supply from eBay and this thing is, well, terrifying. I have never seen a commercial piece of equipment built as poorly as this! This seems to be built with the added feature that it can also remove the operator. Permanently. Still, lets tear it down, attempt a repair, and power the thing on! 0:00 Intro 0:16 Tattoo Laser Power Supply 1:50 Inside the case, SMPS, faults, and high voltage power supply 6:25 Switched Mode power Supply Board faults 7:16 SMPS parts stripped 8:00 New MOSFET, Resistors and SCR and repair 8:31 Schematic of the Switched Mode Power Supply 10:25 Power on smoke test 11:29 Re-assembled power on 12:29 Laser setup 13:48 Full test 15:30 An interesting failure mode 17:19 Discussion of failure mode and Options 19:22 TL431 shut regulator as an option 20:05 Out