500V insulation test of a British General USB socket.

Test of the Yihua 502D USB bench power supply. (With fix!)

Testing random meters for accuracy with DIY resistance tester.

How to make an authentic Joule Thief.

Dangerous Multiway Extension Lead ASTRA BT311 (Part 1)

How an RCD / GFI works and troubleshooting rogue tripping.

Really neat transparent RCD/GFI. (with schematic)

Don't buy it! 25 useful woodworking hacks that will save you money.

Inside an Arbra dynamite exploder. (With explosion and danger-cats.)

How to use a multimeter like a pro! The Ultimate guide

Driving DC Motors with Microcontrollers

Designing the Centaur pinball replacement echo card.

3-cell lithium power pack with no balancing?

This goofy fridge has a really clever design. It's also kinda terrible.

Multimeters - The Complete Guide

Fixing a faulty LSPA7 smart plug (XiangHeWang)

Things you should know about fuses. (including a 15kV one)

Dangerous cube-shaped USB charger with 2 ports

Fixing a fart-extractor (with schematic)

Let's build iOS 16 in React Native 🤔

How to Make Custom ESP32 Board in 3 Hours | Full Tutorial