[Dzl] and his rather serious looking son are metal detector enthusiasts ... This one differs by using an Arduino to read from the metal detecting coil. The circuit starts with an oscillator ...

[vonPongrac] stumbled upon this handy guide, a free eBook on 50 555 Circuits, which contains many cool project ideas, including a simple metal detector circuit. It’s a very basic concept that ...

An embedded process detector circuit which helps Integrated Circuit (IC) developers to address the problem of process variability on low-geometry CMOS designs. The process detector provides the means ...