Topic

mains safety

5 videos. Ranked by independent recommendations, not by views.

1. 

   1 EEVblog #279 - How NOT To Blow Up Your Oscilloscope!

   EEVblog 57 people · 49 months · since May 2013

   Widely cited explanation of why oscilloscope grounds are tied to earth and how careless probing of mains or earthed circuits can destroy the scope.

2. 

   2 Horrific USB power supply fault. (Electrocution risk.)

   bigclivedotcom 4 people · 5 months · since Aug 2016

   A teardown of a dangerous cheap USB charger, cited whenever someone asks why bargain mains adapters are worth avoiding.

3. 

   3 Deadly camping light with 240v USB outlet.

   bigclivedotcom 4 people · 4 months · since Jan 2017

   Big Clive tears down a camping light whose capacitive dropper can leave its USB port at mains potential; cited as a vivid example of unsafe cheap design.

4. 

   4 DIY Lab Bench Power Supply

   GreatScott! 3 people · 3 months · since Sept 2016

   A guide to turning a spare computer power supply into a bench supply, linked both as a suggestion and as the plan people were following.

5. 

   5 Inside a fake un-trippable circuit breaker.

   bigclivedotcom 3 people · 3 months · since Aug 2021

   Shared as a cautionary teardown showing cheap circuit breakers with no real trip mechanism inside, used to warn against unbranded safety parts.