For a lot of reasons, home etching of PCBs is somewhat of a dying art. The main reason is the rise of quick-turn PCB fabrication services, of course; when you can send your Gerbers off and receive … ...

I had a 1960-vintage VOM (Volt-Ohm-Milliammeter, for you young-uns) that had a copper oxide bridge rectifier for its AC ranges. As I recall, its forward voltage drop was pretty low; lower than ...

Preparation of Copper 1 Oxide. Copper (I) oxide is commonly prepared by the straightforward oxidation of copper metal. The process can be affected by additives such as acids and water, and further ...