Ultrasonic pest repeller teardown
A look inside one of the many controversial ultrasonic pest repellers. These things claim to repel rodents and insects from…
DIY pinball-style lights for recessing into wooden surfaces
This project turned out even better than expected. It was inspired by the lights used in pinball machine playfields, where…
Troubleshooting a faulty dog-race timer
I love this unit. It's very clearly a low volume hand-made electronic product for a very niche market. It shows…
Inside an LED fish lure (with schematic)
This is a waterproof light that apparently lures fish at night. They're available in a few different colours and operate…
Inside a single-use electrosurgery/cauterising pen
This is a common tool used by surgeons to make clean cuts that don't bleed. It's a probe that uses…
eBay’s biggest ioniser module depotted (with schematic)
This high voltage module contains a very traditional, but simple circuit to boost the mains supply voltage up to several…
Poundland lithium cell vs the mighty AvE hammer
I thought it might be a good idea to use AvE's bigger copper swing press to drive a nail through…
Excellently awful eBay trash (with schematic)
I'll make a wild guess that this product was pushed out fast to cash in on the pandemic. It's an…
DIY USB customisable LED cluster with files
A project that uses a small PCB and optional 3D printed case (not needed) to create a very simple spray…
Diagnosing a faulty PSU
A very common PSU fault on a fairly nice power supply from a media player.Don't be fooled by the cheap…