Exploring a mass produced solar charge controller
Exploring a mystery PCB that is actually very neat
How a stungun creates 20kV from a 9V battery
A detailed look at the trip mechanism in circuit breakers
Fixing and upgrading a favourite solar light
Random stuff, a teardown and a little bit of smoke
Camping, fishing and off-grid insect repellent vaporizer
Exploring a "retro" LED floodlight with a well designed driver
Fixing a faulty electric shower PCB (no microcontroller)
Better USB chargeable keychain flashlight
Inside a Positive Input Ventilation (PIV) unit
Inside a non-contact infrared light switch
Disaster of a product - so many things wrong
USB glitter lamp with REAL thermal convection
Fluorescent ballast tests and teardowns - with schematics
Magnetically actuated lights - one with bad software
Randomly overpowered scammy "sterilising" lights
Testing a copper pipe cleaner - it didn't go well
Exploring an Anker power bank