Inside a lithium powered led safety vest
It turns out that this LED safety vest is made by a company in the Netherlands, and that makes me…
Exploring a failed british shaver socket
It turns out that my guess of 100VA was a bit old fashioned. This thing was rated a mere 20VA…
Fixing and hacking a light from thomas nagy
Thomas sent me this dead light a while ago. It turned out to have an interesting bit of power supply…
Charging nimh cells – smart vs dumb chargers
A brief summary of NiMH cells and their charging techniques, and why smart chargers are usually not so smart. Nickel…
Inside a simple battery tester with schematic
A nice simple device for a change. This is a battery or cell tester that I've been using for a…
Russian happy meal – military ration
MRE's (Meal Ready to Eat) are normally issued as military rations, or to workers during disaster recovery works. They're fascinating.…
Inside an osram airzing photocatalytic air purifier
It appears this is an older model, but the technology is the same. UV-A light from LEDs is shone onto…
Ebay landfill – solar power car aroma thing
You know how you sometimes get a strong desire to attach things to your vehicle dashboard with cheap double sided…
Ebay atomiser module test with schematic
A look at a very common little atomiser module sold on eBay. This style of circuit is often found in…
Exploring wireless leds with schematic and waveforms
These wireless LEDs seem to be aimed at modellers to allow them to add lights to models without any complex…