Inside a proper optical smoke detector status
A look inside a photoelectric smoke detector that uses infrared light to detect an increasing smoke level in a room.…
Some thoughts about veritasium’s electricity theory
By request, some ponderments on the theory presented by Veritasium that energy transfer between a source and load is via…
Ebay is still selling dangerous christmas lights
Grey import Christmas lights have been sold on eBay for a very long time. These are products that are shipped…
Exploring an arcade roulette wheel mechanism
This is the motorised roulette wheel mechanism out of a huge six player arcade machine. This type of machine has…
Solar floating inflatable orb teardown with schematic
Quite a neat device. It's basically an inflatable ball with a weighted base so that it floats (or hangs) with…
Cordless soldering iron teardown with schematic
A look inside a portable soldering iron that uses a vapour style power supply. After it was suggested, I bought…