Nice 1w led festoon lamp plus experimental mods
I'll start by saying that in the UK the term "festoon lighting" means a cable with lots of lamps spaced…
Very tacky ebay led filament bulb
Visually this LED filament bulb looks nice, and to be fair it does light up... But with no smoothing at…
Ultra small solar power bank with retro circuitry with schematic
I missed a resistor on the first page of the schematic while drawing a neater one. Can you work out…
Inside an ebay sonic health bracelet for lymph drainage and fat reduction
The original listing for this watch stated "Slimwe Ultrasonic Body Shape Wristband, Lymph Drainage Magnetic Bracelet" Which may be copied…
Inside the aldi ferrex 20/40v battery charger with schematic
An internal exploration of the charger used for the dual voltage Activ Energy 20/40V power tool batteries. The circuitry breaks…
Pound shop 4th version camping light with schematic
Different again! This one came from One Below, or possibly now One Beyond. I think this one has the harshest…
Ghost repelling off-grid device
A dual purpose device that not only repels ghosts, but provides a reassuring ambient glow for remote off grid locations.…
Fancy 1-8 cell lithium battery level indicator
This is the more sophisticated battery level gauge than the earlier op-amp based one. It uses a microcontroller to do…
Unusually spicy little ionizer – with schematic
The biggest surprise from this unit is the very high ion output from such a tiny transformer and simple pulse…
Inside a lithium battery monitor with schematic
I've seen these on eBay in various forms and decided to get one to reverse engineer. Rather pleasingly, they have…